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This prospectus supplement and the accompanying prospectus relate to an effective registration statement under the Securities Act of 1933, but the prospectus supplement is not complete and may be changed. This prospectus supplement and the accompanying prospectus are not an offer to sell these securities and are not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

Filed Pursuant to Rule 424(b)(2)
Registration Statement No. 333-165054

Subject to Completion Preliminary Prospectus Supplement dated March 12, 2012

PROSPECTUS SUPPLEMENT

(To Prospectus dated February 24, 2010)

$400,000,000

    % Senior Notes due 2022

We are offering $400.0 million aggregate principal amount of     % Senior Notes due                     , 2022 (the “notes”). We will pay interest on the notes on              and             of each year, beginning on                     , 2012. The notes will mature on                     , 2022. We may redeem some or all of the notes at the redemption prices set forth in this prospectus supplement. If a change of control triggering event as described in this prospectus supplement under the heading “Description of the notes—Change of control offer” occurs, we may be required to offer to purchase the notes from the holders.

The notes will be our senior and unsecured obligations and will rank equally in right of payment with all of our existing and future senior indebtedness and senior in right of payment to all of our existing and future subordinated indebtedness. The notes will be structurally subordinated to any of our existing and future secured indebtedness to the extent of the value of the collateral securing such indebtedness, including all borrowings under our senior secured revolving credit facility. The notes will be structurally subordinated to all liabilities of our subsidiaries.

Investing in the notes involves risks that are described in the “Risk factors” section beginning on page S-5 of this prospectus supplement.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The notes will be ready for delivery in book-entry form only through the facilities of The Depository Trust Company for the accounts of its participants, including Euroclear Bank S.A./N.V., as operator of the Euroclear System, and Clearstream Banking, société anonyme, on or about March     , 2012.

Joint Book-Running Managers

Co-Lead Managers

PNC Capital Markets LLC                                                      RBS                                                          Scotiabank

Senior Co-Managers

Citigroup                                         ING                                          Natixis                                              Wells Fargo Securities

Co-Managers

BNY Mellon Capital Markets, LLC                     COMMERZBANK                     Fifth Third Securities, Inc.                     HSBC

The date of this prospectus supplement is March     , 2012.

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In making your investment decision, you should rely only on the information contained or incorporated by reference in this prospectus supplement and the accompanying prospectus. We have not, and the underwriters have not, authorized anyone to provide you with additional or different information. If anyone provides you with different or inconsistent information, you should not rely on it. We are not making an offer of these securities in any jurisdiction where the offer is not permitted. You should not assume that the information contained in or incorporated by reference in this prospectus supplement or the accompanying prospectus is accurate as of any time subsequent to the date of such information.

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Prospectus supplement

Prospectus

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About this prospectus supplement

This document consists of two parts. The first part is the prospectus supplement, which describes the specific terms of this offering and certain other matters relating to United States Steel Corporation. The second part, the accompanying prospectus, gives more general information about securities we may offer from time to time, some of which do not apply to this offering. Generally, when we refer to the prospectus, we are referring to both parts of this document combined. If the description in the prospectus supplement differs from the description in the accompanying prospectus, the description in the prospectus supplement supersedes the description in the accompanying prospectus.

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Risk factors

Before investing in the notes, you should carefully consider the risks set forth in Item 1A of our annual report on Form 10-K for the year ended December 31, 2011, as well as the following risks. These risks are not the only ones facing us. Additional risks not presently known to us or that we currently deem immaterial may also impair our business operations or the value of the notes.

Risks related to an investment in the notes

The notes do not impose any limitations on our ability to incur additional debt or other obligations.

The senior indenture governing the notes does not restrict the future incurrence of secured indebtedness, unsecured indebtedness, guarantees or other obligations. Except for the limitations in granting liens or entering into sales and leaseback of certain assets we currently own within the definition of “Principal Property”, the senior indenture does not restrict our ability to grant liens on our assets or to engage in sales and leaseback transactions. See “Description of the notes—Limitations on liens and limitations on sales and leasebacks.”

The notes will be effectively junior to the Credit Facility and any other secured indebtedness that we may issue in the future.

The notes are unsecured. Holders of our secured debt that we may issue in the future may foreclose on the assets securing such debt, reducing the cash flow from the foreclosed property available for payment of unsecured debt, including the notes. We have granted the lenders under our Credit Facility a first lien on the majority of our domestic inventories and certain accounts receivable. Holders of our secured debt also would have priority over unsecured creditors in the event of our bankruptcy, liquidation or similar proceeding to the extent of the value of the collateral securing such indebtedness. As a result, the notes will be effectively junior to the Credit Facility, secured obligations under capital leases and any secured debt that we may issue in the future to the extent of the value of the collateral securing such indebtedness.

The notes are obligations exclusively of U. S. Steel and not of our subsidiaries, and payment to holders of the notes will be structurally subordinated to the claims of our subsidiaries’ creditors.

The notes are not guaranteed by any of our subsidiaries. As a result, liabilities, including indebtedness or guarantees of indebtedness, of each of our subsidiaries, will effectively rank senior to the indebtedness represented by the notes, to the extent of such subsidiary’s assets. As of December 31, 2011, our subsidiaries had an aggregate of approximately $276 million of indebtedness outstanding, including C$150 million (approximately $147 million) due to the Province of Ontario under the Province Note and €100 million (approximately $129 million) due under the USSK revolving credit facility.

The definition of a “Change of Control” requiring us to repurchase the notes is limited, and the market price of the notes may decline if we enter into a transaction that is not a Change of Control under the senior indenture governing the notes.

The term “Change of Control” (as defined in the senior indenture) is limited in its scope and does not include many events that might cause the market price of the notes to decline. Furthermore, we are required to repurchase notes of each series upon a Change of Control only if, as a result of such Change of Control, the notes receive certain reductions in ratings, and the Rating

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Agencies (as defined in the senior indenture) assigning the ratings expressly link the reductions in ratings to the Change of Control. As a result, our obligation to repurchase the notes upon the occurrence of a Change of Control is limited and may not preserve the value of the notes in the event of a highly leveraged transaction, reorganization, merger or similar transaction.

Although our other senior notes generally have the same change of control protection as the notes, others, such as the lenders under our Credit Facility and the United Steelworkers, have broader change of control protection, and the senior indenture governing the notes does not restrict our ability to agree to change of control provisions or to enter into transactions that would constitute a change of control under the notes or in any other agreement into which we may enter.

If we experience a Change of Control, we may not have sufficient funds or be permitted under the terms of our debt instruments to repurchase the notes. See “Description of the notes—Change of control offer.”

There is no public market for the notes, which could limit their market price or your ability to sell them.

The notes are a new issue of securities for which there currently is no trading market. As a result, a market may not develop for any series of notes and you may not be able to sell your notes. Any notes that are traded after their initial issuance may trade at a discount from their initial offering price. Future trading prices of the notes will depend on many factors, including prevailing interest rates, the market for similar securities, general economic conditions and our financial condition, performance and prospects. Accordingly, you may be required to bear the financial risk of an investment in the notes for an indefinite period of time. We do not intend to apply for listing or quotation of the notes on any securities exchange or automated quotation system. While the underwriters may make a market in the notes they are not required to do so and consequently any market making with respect to the notes may be discontinued at any time without notice. Even if the underwriters make a market in the notes the liquidity of such a market may be limited. See “Underwriting.”

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Use of proceeds

The net proceeds from the sale of the notes in this offering are estimated to be approximately $         million, after deducting underwriting discounts and our expenses. We intend to use the net proceeds from this offering to redeem our $300.0 million of 5.650% Senior Notes due 2013 and will use any remaining proceeds for general corporate purposes. Certain of the underwriters and their affiliates hold a portion of the 5.650% Senior Notes due 2013, and consequently they may receive a portion of the net proceeds.

Ratio of earnings to fixed charges

The following table sets forth the ratio of our earnings to fixed charges for the periods indicated:

For the purposes of calculating the ratio of earnings to fixed charges, “earnings” are defined as income before income taxes and extraordinary items and before adjustment for noncontrolling interests in consolidated subsidiaries or income (loss) from equity investees, and capitalized interest, plus fixed charges, amortization of capitalized interest and distributions from equity investees. “Fixed charges” consist of interest, whether expensed or capitalized, on all indebtedness, amortization of premiums, discounts and capitalized expenses related to indebtedness, and an interest component equal to one-third of rental expense, representing the portion of rental expense that management believes is attributable to interest.

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Capitalization

The following table sets forth our cash and cash equivalents and our capitalization as of December 31, 2011:

You should read the information in this table in conjunction with the information set forth following the caption “Use of proceeds” and the financial statements and notes thereto incorporated by reference into this prospectus supplement and accompanying prospectus. In addition to the amounts set forth below, as of December 31, 2011, U. S. Steel had $380 million of outstanding borrowings based on receivables sold to third-party conduits under its Receivables Purchase Agreement.

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Description of the notes

The following description of the particular terms of the notes offered by this prospectus supplement supplements the description of the general terms and provisions of the debt securities set forth in the accompanying prospectus following the caption “Description of the debt securities.”

In this description of the notes, the terms “Company,” “we,” “us” and similar words refer only to United States Steel Corporation and not to any of its subsidiaries. The notes constitute a separate series under the senior indenture.

The notes will be issued under a senior indenture dated May 21, 2007, as amended and supplemented, between us and The Bank of New York Mellon, as trustee. The senior indenture is subject to and is governed by the Trust Indenture Act of 1939, as amended. We have filed a form of the senior indenture as an exhibit to the registration statement of which the accompanying prospectus forms a part. The following description summarizes selected provisions of the senior indenture and the notes. It does not restate the senior indenture or the terms of the notes in their entirety. We urge you to read the forms of the senior indenture and the notes because the senior indenture and the notes define the rights of noteholders.

General

The notes:

Interest on the notes will:

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If any interest payment date or maturity date falls on a day that is not a business day, the required payment of principal or interest will be made on the next business day as if made on the date that payment was due, and no interest will accrue on that payment for the period from and after the interest payment date or maturity date, as the case may be, to the date of the payment on the next business day.

Ranking

The notes will be our senior and unsecured indebtedness and will rank equally with all of our other existing and future senior and unsecured indebtedness. The notes will effectively rank junior to any of our existing and future secured indebtedness to the extent of the assets securing such indebtedness, and will be structurally subordinated to any indebtedness and other liabilities of our subsidiaries. Indebtedness of our subsidiaries and obligations and liabilities of our subsidiaries are structurally senior to the notes since, in the event of our bankruptcy, liquidation, dissolution, reorganization or other winding up, the assets of our subsidiaries will be available to pay the notes only after the subsidiaries’ indebtedness and obligations and liabilities are paid in full. Because we generally stand as an equity holder, rather than a creditor, of our subsidiaries, creditors of those subsidiaries will have their debt satisfied out of the subsidiaries’ assets before our creditors, including the noteholders.

As of December 31, 2011, we had an aggregate of approximately $3,609 million of senior indebtedness outstanding (consisting of approximately $3,063 million of senior notes, $455 million of obligations relating to environmental revenue bonds, $70 million relating to recovery zone facility bonds, and $21 million of obligations under capital leases and other debt, excluding intercompany liabilities). In addition, as of December 31, 2011, we had $380 million of outstanding borrowings based on receivables sold to third-party conduits under our Receivables Purchase Agreement.

Additional issuances

We may issue additional notes, without limitation and without your consent. If we issue additional notes offered by this prospectus supplement under the senior indenture, they will have the same terms and conditions as the notes being offered by this prospectus supplement in all respects (except for the payment of interest accruing prior to the issue date of the additional notes) so that the additional notes may be consolidated and form a single series with the notes of that series issued under this prospectus supplement.

Optional redemption

On and after                     , 2017, we may redeem the notes, at our option, at any time in whole or from time to time in part, upon not less than 30 nor more than 60 days notice, at the redemption prices (expressed in percentages of principal amount) listed below, plus accrued and unpaid interest on the notes, if any, to, but excluding, the applicable redemption date, if redeemed during the twelve-month period beginning on              of the years indicated below. See “Description of the notes—Optional redemption.”

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At any time prior to                     , 2017, we may also redeem the notes, at our option, at any time in whole, or from time to time in part, at a price equal to the greater of:

plus accrued and unpaid interest, if any, to, but excluding, the date of redemption.

The notes called for redemption become due on the date fixed for redemption. Notices of redemption will be mailed by first-class mail at least 30 but not more than 60 days before the redemption date to each holder of notes to be redeemed at its registered address. The notice of redemption for the notes will state the amount to be redeemed. On and after the redemption date, interest will cease to accrue on any notes that are redeemed. If less than all of the notes are redeemed at any time, the trustee will select notes on a pro rata basis or by any other method the trustee deems fair and appropriate.

For purposes of determining the optional redemption price, the following definitions are applicable:

“Comparable Treasury Issue” means the United States Treasury security selected by an Independent Investment Banker as having a maturity comparable to the period from the redemption date to                     , 2017 that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity.

“Comparable Treasury Price” means, with respect to any redemption date, the average of the Reference Treasury Dealer Quotations obtained by us for that redemption date, after excluding the highest and lowest of such Reference Treasury Dealer Quotations, or, if we are unable to obtain at least four such Reference Treasury Dealer Quotations, the average of all Reference Treasury Dealer Quotations obtained by us.

“Independent Investment Banker” means J.P. Morgan Securities LLC, or, if such firm is unwilling or unable to select the applicable Comparable Treasury Issue, an independent investment banking institution of national standing appointed by us.

“Reference Treasury Dealer” means J.P. Morgan Securities LLC and its successors, and at least two other primary U.S. government securities dealers in New York City (each, a “Primary Treasury Dealer”) selected by the Independent Investment Banker; provided, however, that if any of the foregoing shall cease to be a Primary Treasury Dealer, we shall substitute therefor another Primary Treasury Dealer.

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any redemption date for the notes, an average, as determined by us, of the bid and asked prices for the Comparable Treasury Issue for the notes, expressed in each case as a percentage of its principal amount, quoted in writing to the trustee by the Reference Treasury Dealer at

3:30 p.m., New York City time, on the third business day preceding the redemption date.

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“Treasury Yield” means, with respect to any redemption date applicable to the notes, the rate per annum equal to the semiannual equivalent yield to maturity, computed as of the third business day immediately preceding the redemption date, of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue, expressed as a percentage of its principal amount, equal to the applicable Comparable Treasury Price for the redemption date.

Any redemption may, in the Company’s discretion, be subject to the satisfaction of one or more conditions precedent.

The notes will not be entitled to the benefit of any sinking fund.

Change of control offer

If a Change of Control Repurchase Event occurs, unless the Company has exercised its right to redeem the notes as already described, the Company will be required to make an offer to each holder of the notes to repurchase all or any part (in excess of $1,000 and in integral multiples of $1,000) of that holder’s notes at a repurchase price in cash equal to 101% of the aggregate principal amount of the notes repurchased plus any accrued and unpaid interest on the notes repurchased to, but not including, the date of repurchase. Within 30 days following any Change of Control Repurchase Event or, at the option of the Company, prior to any Change of Control, but after the public announcement of the Change of Control, the Company will mail a notice to each holder, with a copy to the trustee, describing the transaction or transactions that constitute or may constitute the Change of Control Repurchase Event and offering to repurchase the notes on the payment date specified in the notice, which date will be no earlier than 30 days and no later than 60 days from the date such notice is mailed. The notice shall, if mailed prior to the date of consummation of the Change of Control, state that the offer to purchase is conditioned on a Change of Control Repurchase Event occurring on or prior to the payment date specified in the notice. The Company will comply with the requirements of Rule 14e-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and any other securities laws and regulations thereunder to the extent those laws and regulations are applicable in connection with the repurchase of the notes as a result of a Change of Control Repurchase Event. To the extent that the provisions of any securities laws or regulations conflict with the Change of Control Repurchase Event provisions of the notes, the Company will comply with the applicable securities laws and regulations and will not be deemed to have breached its obligations under the Change of Control Repurchase Event provisions of the notes by virtue of such conflict.

On the repurchase date following a Change of Control Repurchase Event, the Company will, to the extent lawful:

The paying agent will promptly mail to each holder of notes properly tendered, the purchase price for the notes, and the trustee will promptly authenticate and mail (or cause to be transferred by book-entry) to each holder a new note equal in principal amount to any unpurchased portion of any notes surrendered.

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The Company will not be required to make an offer to repurchase the notes upon a Change of Control Repurchase Event if a third party makes such an offer in the manner, at the times and otherwise in compliance with the requirements for an offer made by the Company and such third party purchases all notes properly tendered and not withdrawn under its offer.

The Change of Control Repurchase Event feature of the notes may in certain circumstances make more difficult or discourage a sale or takeover of the Company and, thus, the removal of incumbent management. The Change of Control Repurchase Event feature is a result of negotiations between the Company and the underwriters. The Company has no present intention to engage in a transaction involving a Change of Control, although it is possible that the Company could decide to do so in the future. As contemplated by the definition of Change of Control, the Company could enter into certain transactions, including acquisitions, refinancings or other recapitalizations, that would not constitute a Change of Control under the senior indenture, but that could increase the amount of indebtedness outstanding at such time or otherwise affect the capital structure of the Company or credit ratings of the notes. Restrictions on the ability of the Company to incur Liens (as defined herein) and enter into sale and leaseback transactions are contained in the covenants as described following the caption “—Covenants—Limitation on liens” and “—Covenants—Limitation on sale and leaseback transactions.” Except for the limitations contained in such covenants and the covenant relating to repurchases upon the occurrence of a Change of Control Repurchase Event, the senior indenture will not contain any covenants or provisions that may afford holders of the notes protection in the event of a highly leveraged transaction.

The Company may not have sufficient funds to repurchase all the notes upon a Change of Control Repurchase Event. Even if it has sufficient funds, the Company may be prohibited from repurchasing the notes under the terms of its future debt instruments. See “Risk factors—Risks related to an investment in the notes—The definition of a Change of Control requiring us to repurchase the notes is limited and the market price of the notes may decline if we enter into a transaction that is not a Change of Control under the indenture governing the notes.”

For purposes of the foregoing discussion of a repurchase at the option of holders, the following definitions are applicable:

“Change of Control” shall occur if: (1) any “person” (as such term is used in Sections 13(d) and 14(d) of the Exchange Act) is or becomes the “beneficial owner” (as defined in Rules 13d-3 and 13d-5 under the Exchange Act, except that for purposes of this clause (1) such person shall be deemed to have “beneficial ownership” of all shares that any such person has the right to acquire, whether such right is exercisable immediately or only after the passage of time), directly or indirectly, of more than 50% of the total voting power of the Voting Stock of the Company; (2) individuals who on the issue date of the notes constituted the Board of Directors (together with any new directors whose election by such Board of Directors or whose nomination for election by the shareholders of the Company was approved by a vote of 66 2/3% of the directors of the Company then still in office who were either directors on the issue date of the notes or whose election or nomination for election was previously so approved) cease for any reason to constitute a majority of the Board of Directors then in office; (3) the adoption of a plan relating to the liquidation or dissolution of the Company; or (4) the merger or consolidation of the Company with or into another person or the merger of another person with or into the Company, or the sale of all or substantially all the assets of the Company (determined on a consolidated basis) to another person, other than a merger or consolidation transaction in which holders of securities that represented 100% of the Voting Stock of the Company immediately

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prior to such transaction (or other securities into which such securities are converted as part of such merger or consolidation transaction) own directly or indirectly at least a majority of the voting power of the Voting Stock of the surviving person in such merger or consolidation transaction immediately after such transaction and in substantially the same proportion as before the transaction.

“Change of Control Repurchase Event” means the occurrence of both a Change of Control and a Ratings Event.

“Investment Grade” means a rating of Baa3 or better by Moody’s (or its equivalent under any successor Rating Categories of Moody’s), a rating of BBB- or better by S&P (or its equivalent under any successor Rating Categories of S&P) and the equivalent Investment Grade credit rating from any additional Rating Agency or Rating Agencies selected by the Company.

“Moody’s” means Moody’s Investors Service Inc.

“Rating Agency” means (1) each of Moody’s and S&P and (2) if either of Moody’s or S&P ceases to rate the notes or fails to make a rating of the notes publicly available for reasons outside of the control of the Company, a “nationally recognized statistical rating organization” within the meaning of Section 3(a)(62) under the Exchange Act, selected by the Company (as certified by a resolution of the board of directors of the Company) as a replacement agency for Moody’s or S&P, or both, as the case may be.

“Rating Category” means (i) with respect to S&P, any of the following categories: BBB, BB, B, CCC, CC, C and D (or equivalent successor categories); (ii) with respect to Moody’s, any of the following categories: Baa, Ba, B, Caa, Ca, C and D (or equivalent successor categories); and (iii) the equivalent of any such category of S&P or Moody’s used by another Rating Agency. In determining whether the rating of the notes has decreased by one or more gradations, gradations within Rating Categories (+ and - for S&P; 1, 2 and 3 for Moody’s; or the equivalent gradations for another Rating Agency) shall be taken into account (e.g., with respect to S&P, a decline in a rating from BB+ to BB, as well as from BB- to B+, will constitute a decrease of one gradation).

“Rating Date” means the date that is 60 days prior to the earlier of (i) a Change of Control or (ii) public notice of the occurrence of a Change of Control or of the intention by the Company to effect a Change of Control.

“Ratings Event” means the occurrence of the events described in (a) or (b) of this definition on, or within 60 days after the earlier of, (i) the occurrence of a Change of Control or (ii) public notice of the occurrence of a Change of Control or the intention by the Company to effect a Change of Control (which period shall be extended so long as the rating of the notes is under publicly announced consideration for a possible downgrade by any of the Rating Agencies): (a) if the notes are rated by both Rating Agencies on the Rating Date as Investment Grade, the rating of the notes shall be reduced so that the notes are rated below Investment Grade by both Rating Agencies, or (b) if the notes are rated below Investment Grade by at least one Rating Agency, the ratings of the notes by both Rating Agencies shall be decreased by one or more gradations (including gradations within Rating Categories, as well as between Rating Categories) and the notes are then rated below Investment Grade by both Rating Agencies.

Notwithstanding the foregoing, a Ratings Event otherwise arising by virtue of a particular reduction in rating shall not be deemed to have occurred in respect of a particular Change of Control (and thus shall not be deemed a Ratings Event for purposes of the definition of Change

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of Control Repurchase Event hereunder) if the Rating Agencies making the reduction in rating to which this definition would otherwise apply do not announce or publicly confirm or inform the trustee in writing at its request that the reduction was the result, in whole or in part, of any event or circumstance comprised of or arising as a result of, or in respect of, the applicable Change of Control (whether or not the applicable Change of Control shall have occurred at the time of the Ratings Event).

“S&P” means Standard & Poor’s, a division of The McGraw-Hill Companies, Inc.

“Voting Stock” of any specified “person” (as that term is used in Section 13(d)(3) of the Exchange Act) as of any date means the capital stock of such person that is at the time entitled to vote generally in the election of the board of directors of such person.

Covenants

Except as described in “—Limitation on liens” and “—Limitation on sale and leaseback transactions,” neither the Company nor any of its subsidiaries will be restricted by the senior indenture from:

In addition, the Company will not be required to maintain any financial ratios or specified levels of net worth or liquidity or to repurchase or redeem or otherwise modify the terms of any of the notes upon a change of control or other events involving us or any of our subsidiaries which may adversely affect the creditworthiness of the notes, except to the limited extent described following the caption “—Purchase of notes upon a change of control repurchase event”. Among other things, the senior indenture will not contain covenants designed to afford holders of the notes any protections in the event of a highly leveraged or other transaction involving the Company that may adversely affect holders of the notes, except to the limited extent described following the caption “—Purchase of notes upon a change of control repurchase event”.

The senior indenture contains the following principal covenants:

Limitation on liens

The Company will not incur, and will not permit any of its Subsidiaries to incur, any indebtedness for borrowed money secured by a mortgage, security interest, pledge, lien, charge or other similar encumbrance (collectively, “Liens”) upon (a) any Principal Property of the Company or any Principal Property of a Subsidiary or (b) any shares of stock or other equity interests or Indebtedness of any Subsidiary that owns a Principal Property (whether such Principal Property, shares of stock or other equity interests or Indebtedness is now existing or owned or hereafter created or acquired), in each case, unless prior to or at the same time, the notes (together with, at the option of the Company, any other indebtedness of the Company or any Subsidiary ranking equally in right of payment with the notes) are equally and ratably secured with or, at the option of the Company, prior to, such indebtedness.

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Any Lien created for the benefit of the holders of the notes pursuant to the preceding sentence shall provide by its terms that such Lien shall be automatically and unconditionally released and discharged upon the release and discharge of such Lien.

The foregoing restriction does not apply, with respect to any person, to any of the following:

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Notwithstanding the foregoing restrictions, the Company and its Subsidiaries will be permitted to incur indebtedness secured by a Lien which would otherwise be subject to the foregoing restrictions without equally and ratably securing the notes, if any, provided that, after giving effect to such indebtedness, the aggregate amount of all indebtedness secured by Liens (not including Liens permitted under clauses (1) through (12) above), together with all attributable debt outstanding pursuant to the second paragraph of the “—Limitation on sale and leaseback transactions” covenant, does not exceed 15% of the Consolidated Net Tangible Assets of the Company calculated as of the date of the creation or incurrence of the Lien. The Company and its Subsidiaries also may, without equally and ratably securing the notes, create or incur Liens that extend, renew, substitute or replace (including successive extensions, renewals, substitutions or replacements), in whole or in part, any Lien permitted pursuant to the preceding sentence.

Limitation on sale and leaseback transactions

The Company will not directly or indirectly, and will not permit any of its Subsidiaries that own a Principal Property directly or indirectly to, enter into any sale and leaseback transaction for the sale and leasing back of any Principal Property, whether now owned or hereafter acquired, unless:

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Notwithstanding the restrictions set forth in the preceding paragraph, the Company and its Subsidiaries may enter into any sale and leaseback transaction which would otherwise be subject to the foregoing restrictions, if after giving effect thereto the aggregate amount of all attributable debt with respect to such transactions, together with all indebtedness outstanding pursuant to the last paragraph of the “—Limitation on liens” covenant already described, does not exceed 15% of the Consolidated Net Tangible Assets of the Company calculated as of the closing date of the sale and leaseback transaction.

Merger, consolidation or sale of assets

The Company will not, in a single transaction or through a series of related transactions, consolidate or merge with or into any other person, or, directly or indirectly, sell or convey substantially all of its assets to another person or group of affiliated persons, except that the Company may consolidate or merge with, or sell or convey substantially all of its assets to another person if (i) the Company is the continuing person or the successor person (if other than the Company) is organized and existing under the laws of the United States of America, any State thereof or the District of Columbia and such person expressly assumes all obligations of the Company under the senior indenture, including payment of the principal and interest on the notes, and the performance and observance of all of the covenants and conditions of the senior indenture to be performed by the Company and (ii) there is no default under the senior indenture. Upon such a succession, the Company will be relieved from any further obligations under the senior indenture. For purposes of this paragraph, “substantially all of its assets” means, at any date, a portion of the non-current assets reflected in the Company’s consolidated balance sheet as of the end of the most recent quarterly period that represents at least 66% of the total reported value of such assets.

Events of default

The events of default with respect to the notes will be those events described in “Description of the Debt Securities—Events of Default” in the accompanying prospectus, except that the following will also be an event of default:

(1) a failure by the Company to repurchase notes of such series tendered for repurchase following the occurrence of a Change of Control Repurchase Event in conformity with the covenant set forth following the caption “—Change of control offer”;

For a description of the remedies available to holders of the notes as a result of an event of default, see “Description of the Debt Securities—Events of Default” in the accompanying prospectus.

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Definitions

The senior indenture contains the following defined terms:

“Attributable debt” means, with respect to any sale and leaseback transaction, at the time of determination, the lesser of (1) the sale price of the property so leased multiplied by a fraction the numerator of which is the remaining portion of the base term of the lease included in such transaction and the denominator of which is the base term of such lease, and (2) the total obligation (discounted to the present value at the implicit interest factor, determined in accordance with GAAP, included in the rental payments) of the lessee for rental payments (other than amounts required to be paid on account of property taxes as well as maintenance, repairs, insurance, water rates and other items which do not constitute payments for property rights) during the remaining portion of the base term of the lease included in such transaction.

“Consolidated Net Tangible Assets” means, as of the time of determination, the aggregate amount of the assets of the Company and the assets of its consolidated subsidiaries after deducting (1) all goodwill, trade names, trademarks, service marks, patents, unamortized debt discount and expense and other intangible assets and (2) all current liabilities, as reflected on the most recent consolidated balance sheet prepared by the Company in accordance with GAAP contained in an annual report on Form 10-K or a quarterly report on Form 10-Q timely filed or any amendment thereto (and not subsequently disclaimed as not being reliable by the Company) pursuant to the Exchange Act by the Company prior to the time as of which “Consolidated Net Tangible Assets” is being determined.

“Currency agreement” means in respect of a person any foreign exchange contract, currency swap agreement or other similar agreement designed to protect such person against fluctuations in currency values.

“GAAP” means generally accepted accounting principles set forth in the opinions and pronouncements of the Accounting Principles Board of the American Standards Board or in such other statements by such other entity as have been approved by a significant segment of the accounting profession.

“Guarantee” means any obligation, contingent or otherwise, of any person directly or indirectly guaranteeing any indebtedness of any other person and any obligation, direct or indirect, contingent or otherwise, of such person (1) to purchase or pay (or advance or supply funds for the purchase or payment of) such indebtedness of such other person (whether arising by virtue of partnership arrangements, or by agreement to keep well, to purchase assets, goods, securities or services, to take or pay or to maintain financial statement conditions or otherwise) or (2) entered into for purposes of assuring in any other manner the obligee of such indebtedness of the payment thereof or to protect such obligee against loss in respect thereof (in whole or in part); provided, however, that the term “guarantee” will not include endorsements for collection or deposit in the ordinary course of business. The term “guarantee,” when used as a verb, has a correlative meaning.

“Hedging obligation” means the obligations of any person pursuant to any interest rate agreement or currency agreement.

“Holder” means the person in whose name a note is registered on the security register books.

“Incur” means issue, assume, guarantee or otherwise become liable for Indebtedness.

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“Indebtedness” means, with respect to any person, obligations of such person for borrowed money (including without limitation, indebtedness for borrowed money evidenced by notes, bonds, debentures or similar instruments).

“Interest rate agreement” means, in respect of a person, any interest rate swap agreement, interest rate cap agreement or other financial agreement or arrangement designed to protect such person against fluctuations in interest rates.

“Person” means any individual, corporation, partnership, limited liability company, joint venture, association, joint-stock company, trust, unincorporated organization or government or political subdivision thereof.

“Principal Property” means any domestic blast furnace or steel producing facility, or casters that are part of a plant that includes such a facility, in each case located in the United States, having a net book value in excess of 1% of Consolidated Net Tangible Assets at the time of determination.

“Refinance” means, in respect of any indebtedness, to refinance, extend, renew, refund, repay, prepay, redeem, defease or retire, or to issue other indebtedness in exchange or replacement for, such indebtedness. “Refinanced” and “Refinancing” shall have correlative meanings.

“Subsidiary” means, with respect to any person (the “parent”) at any date, any corporation, limited liability company, partnership, association or other entity owning a majority of the shares of securities or other interests having ordinary voting power for the election of directors or another governing body (other than securities or interests having such power only by reason of the happening of a contingency) are at the time beneficially owned directly or indirectly through one or more intermediaries, or both by the parent.

Trustee

The Bank of New York Mellon will be the trustee, security registrar, paying agent and conversion agent for the notes. The Bank of New York Mellon, in each of its capacities, including without limitation as trustee, security registrar, paying agent and conversion agent, assumes no responsibility for the accuracy or completeness of the information concerning us or our affiliates or any other party contained in this document or the related documents or for any failure by us or any other party to disclose events that may have occurred and may affect the significance or accuracy of such information.

We may maintain banking relationships in the ordinary course of business with the trustee and its affiliates. In addition, our Chairman of the Board of Directors and Chief Executive Officer, John Surma, is a director of the parent company of the trustee.

Governing law

The indenture provides that it and the notes will be governed by, and construed in accordance with, the laws of the State of New York.

Exchange and transfer

You may exchange or transfer the notes in accordance with the senior indenture. You will not be required to pay a service charge to exchange or transfer the notes, but you may be required to pay for any tax or other governmental charge associated with the exchange or transfer. The exchange or transfer will only be made if the transfer agent is satisfied with your proof of ownership. See “—Book-entry issuance.”

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Paying and paying agents

The Bank of New York Mellon will act as our paying agent for the notes. We may choose to pay interest by mailing checks or making wire transfers. Regardless of who acts as the paying agent, all money paid by us to a paying agent that remains unclaimed at the end of two years after the amount is due to note holders will be repaid to us. After that two-year period, you may look only to us for payment and not to the trustee, any other paying agent or anyone else. We may also arrange for additional payment offices, and may cancel or change these offices, including any use of the trustee’s corporate trust office. We must notify you of changes in identities of the paying agents for the notes.

Book-entry issuance

The notes will be represented by one or more global notes that will be deposited with and registered in the name of The Depository Trust Company, or DTC, or its nominee. We will not issue certificated notes to you, except in the limited circumstances described below. Each global note will be issued to DTC, which will keep a computerized record of its participants whose clients have purchased the notes. Each participant will then keep a record of its own clients. Unless it is exchanged in whole or in part for a certificated note, a global note may not be transferred. DTC, its nominees and their successors may, however, transfer a global note as a whole to one another, and these transfers are required to be recorded on our records or a register to be maintained by the trustee.

Beneficial interests in a global note will be shown on, and transfers of beneficial interests in the global note will be made only through, records maintained by DTC and its participants. DTC has provided us with the following information: DTC is a limited purpose trust company organized under the New York Banking Law, a “banking organization” within the meaning of the New York Banking Law, a member of the Federal Reserve System, a “clearing corporation” within the meaning of the New York Uniform Commercial Code and a “clearing agency” registered under the provisions of Section 17A of the Exchange Act. DTC holds securities that its direct participants deposit with DTC. DTC also records the settlements among direct participants of securities transactions, such as transfers and pledges, in deposited securities through computerized records for direct participants’ accounts. This book-entry system eliminates the need to exchange certificated securities. Direct participants include securities brokers and dealers, banks, trust companies, clearing corporations and certain other organizations.

DTC’s book-entry system is also used by other organizations such as securities brokers and dealers, banks and trust companies that work through a direct participant. The rules that apply to DTC and its participants are on file with the SEC.

DTC is owned by a number of its direct participants and by the New York Stock Exchange, Inc., the American Stock Exchange, Inc. and the National Association of Securities Dealers, Inc.

When you purchase notes through the DTC system, the purchases must be made by or through a direct participant, which will receive credit for the notes on DTC’s records. When you actually purchase the notes, you will become their beneficial owner. Your ownership interest will be recorded only on the direct or indirect participants’ records. DTC will have no knowledge of your individual ownership of the notes. DTC’s records will show only the identity of the direct participants and the principal amount of the notes held by or through them. You will not receive a written confirmation of your purchase or sale or any periodic account statement directly from

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DTC. You should instead receive these from your direct or indirect participant. As a result, the direct or indirect participants are responsible for keeping accurate account of the holdings of their customers. The trustee will wire payments on the notes to DTC’s nominee. We and the trustee will treat DTC’s nominee as the owner of each global note for all purposes. Accordingly, we, the trustee and any paying agent will have no direct responsibility or liability to pay amounts due on a global note to you or any other beneficial owners in that global note.

We understand that is DTC’s current practice, upon receipt of any payment of distributions or liquidation amounts, to proportionately credit direct participants’ accounts on the payment date based on their holdings. In addition, we understand that it is DTC’s current practice to pass through any consenting or voting rights to such participants by using an omnibus proxy. Those participants will, in turn, make payments to and solicit votes from you, the ultimate owner of notes, based on their customary practices. Payments to you will be the responsibility of the participants and not of DTC, the trustee or the Company.

Notes represented by one or more global notes will be exchangeable for certificated notes with the same terms in authorized denominations only if:

If a global note is exchanged for certificated notes, the trustee will keep the registration books for the notes at its corporate office and follow customary practices and procedures regarding those certificated notes.

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Material U.S. federal income tax considerations

This section describes the material United States federal income tax consequences of owning the notes we are offering. It applies only to a holder that acquires notes in the offering at the offering price listed on the cover page hereof and that holds its notes as capital assets within the meaning of Section 1221 of the Internal Revenue Code of 1986, as amended (the “Code”). This section does not apply to a holder that is a member of a class of holders subject to special rules, such as:

This section is based on the Code, its legislative history, existing and proposed U.S. Department of Treasury regulations under the Code (“Regulations”), published rulings and court decisions, all as currently in effect. These authorities are subject to change, possibly on a retroactive basis. In addition, the following summary does not address all possible tax consequences. In particular, except as specifically provided, it does not discuss any estate, gift, generation-skipping, transfer, state, local or foreign tax consequences. We have not sought a ruling from the Internal Revenue Service (“IRS”), with respect to the statements made and the conclusions reached in the following summary, and there can be no assurance that the IRS will agree with such statements and conclusions. For all these reasons, each holder is urged to consult with its tax advisor about the U.S. federal income tax and other tax consequences of the acquisition, ownership and disposition of the debt securities.

If an entity or arrangement that is treated as a partnership for United States federal income tax purposes holds the notes, the United States federal income tax treatment of a partner will generally depend on the status of the partner and the tax treatment of the partnership. A partner in such an entity or arrangement holding the notes should consult its tax advisor with regard to the United States federal income tax treatment of an investment in the notes.

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HOLDERS ARE ENCOURAGED TO CONSULT THEIR OWN TAX ADVISORS CONCERNING THE CONSEQUENCES OF PURCHASING, OWNING AND DISPOSING OF THE NOTES IN THEIR PARTICULAR CIRCUMSTANCES UNDER THE CODE AND UNDER THE LAWS OF ANY OTHER TAXING JURISDICTION.

U.S. holders

This subsection describes the tax consequences of ownership of the notes to a U.S. holder. A holder is a U.S. holder if that holder is a beneficial owner of a note and is for United States federal income tax purposes:

Payments of interest

We expect that the first price at which a substantial amount of the notes is sold to persons (other than bond houses, brokers or similar persons or organizations acting in the capacity of underwriters, placement agents or wholesalers) will equal the stated principal amount of the notes or an amount which is at a de minimis discount thereto. Thus, stated interest payments on the notes generally will be taxable as ordinary income at the time the interest accrues or is received in accordance with a U.S. holder’s regular method of accounting for U.S. federal income tax purposes. If, contrary to current expectations, the notes are issued at a discount in excess of a de minimis amount, then a U.S. holder generally will be required to include such discount in gross income as it accrues in advance of the receipt of cash attributable to that income.

Additional payments

In certain circumstances, such as those described in “Description of the notes—Optional redemption,” and “Description of the notes—Change of control offer,” we may be obligated to pay amounts in excess of stated interest or principal on the notes. The obligation to make such payments may implicate the provision of the Regulations relating to “contingent payment debt instruments.” If the notes were deemed to be contingent payment debt instruments, a U.S. holder might be required to accelerate the recognition of income with respect to the U.S. holder’s notes in excess of stated interest, and to treat as ordinary income, rather than capital gain, any income realized on the taxable disposition of a note before the resolution of the contingencies.

According to current Regulations, the possibility that any such payments in excess of stated interest or principal will be made will not cause the notes to be treated as contingent payment debt instruments if there is only a remote chance as of the date the notes were issued that such payments will be made or it is significantly more likely than not that the stated payment

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schedule for the notes will occur. We have determined, and intend to take the position that, the stated payment schedule for the notes is significantly more likely to occur than a payment schedule based on a redemption or repurchase as a result of the circumstances described in “Description of the notes—Optional redemption” and the likelihood that a redemption or repurchase as a result of the circumstances described in “Description of the notes—Change of control offer,” will occur is “remote” under the applicable Regulations. Our determinations in this regard are binding on each U.S. holder unless such U.S. holder explicitly discloses that it is taking a different position in a manner described by applicable Regulations. However, our determinations are not binding on the IRS, and if the IRS were to challenge these determinations, the tax consequences to a holder could differ materially and adversely from those discussed herein. In the event a contingency were to occur, it would affect the amount and timing of the income recognized by a U.S. holder. If any additional payments are in fact made, U.S. holders will be required to recognize such amounts as income. The remainder of this disclosure assumes that the debt securities will not be treated as contingent payment debt securities.

Sale, exchange or redemption of the notes

A U.S. holder’s tax basis in a note will generally be the cost of the note. A U.S. holder will generally recognize gain or loss on the sale, retirement or other taxable disposition of a note equal to the difference between the amount realized on the sale, retirement or other taxable disposition (less an amount equal to any accrued but unpaid interest, which will be taxable as ordinary income to the extent not previously included in income) and the U.S. holder’s tax basis in the note. Such gain or loss will be capital gain or loss if the U.S. holder holds the note for more than one year. Capital gain of a noncorporate U.S. holder that is recognized in a taxable year beginning before January 1, 2013 is generally taxed at a maximum rate of 15% (after such time, the maximum rate is scheduled to increase to 20%). The deductibility of capital losses is subject to limitations.

Additional tax on investment income

On March 30, 2010, President Obama signed into law the Health Care and Education Reconciliation Act of 2010. This legislation will require certain individuals, estates and trusts to pay a 3.8% Medicare surtax on “net investment income” including, among other things, interest and proceeds of sales or other dispositions in respect of securities like the notes, subject to certain exceptions. This surtax will apply for taxable years beginning after December 31, 2012. Prospective purchasers of the notes should consult with their own tax advisors regarding the effect, if any, of the legislation on their ownership and disposition of the notes.

Backup withholding and information reporting

In general, in the case of a noncorporate U.S. holder, we are required to report to the Internal Revenue Service all payments of principal and interest on the notes. In addition, we are generally required to report to the Internal Revenue Service any payment of proceeds of the sale of the notes before maturity within the United States. Backup withholding may also apply to any payments if the U.S. holder fails to provide an accurate taxpayer identification number or the U.S. holder is notified by the Internal Revenue Service that the U.S. holder has failed to report all interest and dividends required to be shown on the U.S. holder’s federal income tax returns. Backup withholding is not an additional tax. Any amounts withheld under the backup

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withholding rules will be allowed as a refund or credit against a U.S. holder’s U.S. federal income tax liability, provided the required information is furnished to the Internal Revenue Service.

Non-U.S. holders

This subsection describes the tax consequences of ownership of the notes to a non-U.S. holder. A non-U.S. holder is a beneficial owner of the notes that is neither a U.S. holder nor a partnership (or other entity treated as a partnership for U.S. federal income tax purposes).

Payments of interest

Generally, subject to the discussion of backup withholding below, if you are a non-U.S. holder, interest income will not be subject to U.S. withholding tax under the “portfolio interest rule,” provided that:

If a non-U.S. holder cannot satisfy the requirements described above, payments of interest made to the non-U.S. holder will be subject to a U.S. federal withholding tax at a 30% rate, unless the holder provides us with a properly executed:

If a non-U.S. holder is engaged in a trade or business in the United States and interest on the notes is effectively connected with the conduct of that trade or business (and, if required by an applicable income tax treaty, is attributable to a U.S. permanent establishment), then the holder will be subject to U.S. federal income tax on that interest on a net income basis (although it will be exempt from the 30% U.S. federal withholding tax, provided the certification requirements discussed above are met) in the same manner as if such holder were a U.S. person as defined

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under the Code. In addition, if a non-U.S. holder is a foreign corporation, the holder may be subject to a branch profits tax equal to 30% (or lower applicable tax treaty rate) of such interest, subject to adjustments.

Sale, exchange or redemption of the notes

The 30% U.S. federal withholding tax generally will not apply to any payment of principal or gain that a non-U.S. holder realizes on the sale, retirement or other disposition of a note. Any gain realized on the sale, exchange, redemption, retirement or other disposition of a note generally will not be subject to U.S. federal income tax unless:

Backup withholding and information reporting

Generally, we must report to the IRS and to each non-U.S. holder the amount of interest paid to such holder and the amount of tax, if any, withheld with respect to those payments. Copies of the information returns reporting such interest payments and any withholding may also be made available to the tax authorities in the country in which a non-U.S. holder resides under the provisions of an applicable income tax treaty.

In general, a non-U.S. holder will not be subject to backup withholding with respect to payments on the notes that we make to the holder provided that we do not have actual knowledge or reason to know that the holder is a U.S. person as defined under the Code, and we have received from the holder the statement described above in the fifth bullet point under “—Non-U.S. holders—Payments of interest.”

Information reporting and, depending on the circumstances, backup withholding will apply to the proceeds of a sale of the notes within the United States or conducted through certain U.S.-related financial intermediaries, unless a non-U.S. holder certifies under penalties of perjury that the holder is a non-U.S. holder (and the payor does not have actual knowledge or reason to know that the holder is a U.S. person as defined under the Code), or the holder otherwise establishes an exemption.

Backup withholding is not an additional tax. Any amounts withheld under the backup withholding rules will be allowed as a refund or a credit against a non-U.S. holder’s U.S. federal income tax liability, provided the required information is furnished to the IRS.

Recently enacted federal tax legislation

On March 18, 2010, President Obama signed the “Hiring Incentives to Restore Employment (HIRE) Act”, or the HIRE Act, which includes a revised version of a bill known as the “Foreign Account Tax Compliance Act of 2009” or “FATCA.” Under FATCA, foreign financial institutions (which

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include most hedge funds, private equity funds, mutual funds, securitization vehicles and any other investment vehicles regardless of their size) must comply with new information reporting rules with respect to their U.S. account holders and investors or confront a new withholding tax on U.S. source payments made to them. More specifically, a foreign financial institution or other foreign entity that does not comply with the FATCA reporting requirements will generally be subject to a new 30% withholding tax with respect to any “withholdable payments” made after December 31, 2012. For this purpose, withholdable payments are U.S.-source payments otherwise subject to nonresident withholding tax and also include the entire gross proceeds from the sale of any equity or debt instruments of U.S. issuers. The new FATCA withholding tax will apply even if the payment would otherwise not be subject to U.S. nonresident withholding tax (e.g., because it is capital gain treated as foreign source income under the Code). 2011 IRS guidance provides that regulations implementing this legislation will defer this withholding obligation until January 1, 2014 for payments of interest and dividends and until January 1, 2015 for gross proceeds from dispositions of stock and debt. Treasury is authorized to provide rules for implementing the FATCA withholding regime and coordinating the FATCA withholding regime with the existing nonresident withholding tax rules. FATCA withholding will not apply to certain payments made to beneficial owners that are foreign governments, international organizations, foreign central banks of issue or any other class of persons identified by Treasury as posing a low risk of tax evasion.

FATCA would only apply to debt obligations, like the notes, issued or deemed issued after March 18, 2012. Thus, if the notes are issued on or before March 18, 2012, they generally would not be subject to FATCA. In addition, recently proposed IRS regulations generally would exempt debt obligations issued before January 1, 2013, and the gross proceeds from the subsequent disposition of such obligations, from the application of FATCA. There can be no assurance as to whether or not these proposed regulations will be adopted in final form, and, if so adopted, what form the proposed regulations would take.

Non-U.S. holders are urged to consult with their own tax advisors regarding the effect, if any, of the FATCA provisions to them based on their particular circumstances.

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Underwriting

J.P. Morgan Securities LLC is acting as representative of each of the underwriters named below. Subject to the terms and conditions set forth in a firm commitment underwriting agreement among us and the underwriters, we have agreed to sell to the underwriters, and each of the underwriters has agreed, severally and not jointly, to purchase from us, the principal amount of notes set forth opposite its name below.

Subject to the terms and conditions set forth in the underwriting agreement, the underwriters have agreed, severally and not jointly, to purchase all of the notes sold under the underwriting agreement if any of these notes are purchased. If an underwriter defaults, the underwriting agreement provides that the purchase commitments of the nondefaulting underwriters may be increased or the underwriting agreement may be terminated.

We have agreed to indemnify the several underwriters and their controlling persons against certain liabilities in connection with this offering, including liabilities under the Securities Act, or to contribute to payments the underwriters may be required to make in respect of those liabilities.

The underwriters are offering the notes, subject to prior sale, when, as and if issued to and accepted by them, subject to approval of legal matters by their counsel, including the validity of the notes, and other conditions contained in the underwriting agreement, such as the receipt by the underwriters of officer’s certificates and legal opinions. The underwriters reserve the right to withdraw, cancel or modify offers to the public and to reject orders in whole or in part.

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Commissions and discounts

The representative has advised us that the underwriters propose initially to offer the notes to the public at the public offering price set forth on the cover page of this prospectus supplement and to certain dealers at such price less a concession not in excess of      % of the principal amount of the notes. After the initial offering, the public offering price, concession or any other term of the offering may be changed. The underwriters may offer and sell notes through certain of their affiliates.

The expenses of the offering, not including the underwriting discount, are estimated at $         and are payable by us.

New issue of notes

The notes are a new issue of securities with no established trading market. We do not intend to apply for listing of the notes on any national securities exchange or for inclusion of the notes on any automated dealer quotation system. We have been advised by the underwriters that they presently intend to make a market in the notes after completion of the offering. However, they are under no obligation to do so and may discontinue any market-making activities at any time without any notice. We cannot assure the liquidity of the trading market for the notes or that an active public market for the notes will develop. If an active public trading market for the notes does not develop, the market price and liquidity of the notes may be adversely affected. If the notes are traded, they may trade at a discount from their initial offering price, depending on prevailing interest rates, the market for similar securities, our operating performance and financial condition, general economic conditions and other factors.

No sales of similar securities

We have agreed that we will not, for a period of 30 days after the date of this prospectus supplement, without first obtaining the prior written consent of J.P. Morgan Securities LLC, offer, sell, contract to sell or otherwise dispose of, any debt securities issued or guaranteed by us and having a term of more than one year, except for the notes sold to the underwriters pursuant to the underwriting agreement.

Price stabilization and short positions

In connection with the offering, the underwriters may engage in overallotment, stabilizing transactions and syndicate covering transactions. Overallotment involves sales in excess of the offering size, which creates a short position for the underwriters. Stabilizing transactions involve bids to purchase the notes in the open market for the purpose of pegging, fixing or maintaining the price of the notes. Syndicate covering transactions involve purchases of the notes in the open market after the distribution has become completed in order to cover short positions. Stabilizing transactions and syndicate covering transactions may cause the price of the notes to be higher than it would otherwise be in the absence of those transactions. If the underwriters engage in stabilizing or syndicate covering transactions, they may discontinue them at any time.

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Other relationships

The underwriters and their respective affiliates are full service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, corporate trust, investment management, principal investment, hedging, financing and brokerage activities. Certain of the underwriters and their respective affiliates have, from time to time, performed, and may in the future perform, various financial advisory and investment banking services for us, for which they received or will receive customary fees and expenses. In particular, the affiliates of each of the underwriters are lenders and/or agents under our existing $875 million revolving credit facility. Affiliates of PNC Capital Markets LLC and Scotia Capital (USA) Inc. are committed purchasers under our existing Receivables Purchase Agreement. Certain of the underwriters and their affiliates hold a portion of the 5.650% Senior Notes due 2013, and consequently they may receive a portion of the proceeds. In addition, former Congressman Richard Gephardt, who is a member of our board of directors, is the President and Chief Executive Officer of Gephardt Group, which provides consulting services to an affiliate of Goldman, Sachs & Co.

In the ordinary course of their various business activities, the underwriters and their respective affiliates may make or hold a broad array of investments including serving as counterparties to certain derivative and hedging arrangements and actively trade debt and equity securities (or related derivative securities) and financial instruments (including bank loans) for their own account and for the accounts of their customers, and such investment and securities activities may involve securities and instruments of ours or our affiliates. Certain of the underwriters and their affiliates that have a lending relationship with us routinely hedge, and certain other of those underwriters may hedge, their credit exposure to us consistent with their customary risk management policies. Typically, such underwriters and their affiliates would hedge such exposure by entering into transactions which consist of either the purchase of credit default swaps or the creation of short positions in our securities, including potentially the notes offered hereby. Any such credit default swaps or short positions could adversely affect future trading prices of the notes offered hereby. The underwriters and their respective affiliates may also make investment recommendations or publish or express independent research views in respect of such securities or financial instruments and may at any time hold, or recommend to clients that they acquire, long or short positions in such securities and instruments.

Notice to prospective investors in the EEA

In relation to each Member State of the European Economic Area which has implemented the Prospectus Directive (each, a “Relevant Member State”), each underwriter has represented and agreed that with effect from and including the date on which the Prospectus Directive is implemented in that Relevant Member State it has not made and will not make an offer of notes which are the subject of the offering contemplated by this prospectus to the public in that Relevant Member State other than:

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For the purposes of this provision, the expression an “offer of notes to the public” in relation to any notes in any Relevant Member State means the communication in any form and by any means of sufficient information on the terms of the offer and the notes to be offered so as to enable an investor to decide to purchase or subscribe the notes, as the same may be varied in that Member State by any measure implementing the Prospectus Directive in that Member State, the expression “Prospectus Directive” means Directive 2003/71/EC (and amendments thereto, including the 2010 PD Amending Directive, to the extent implemented in the Relevant Member State), and includes any relevant implementing measure in the Relevant Member State, and the expression “2010 PD Amending Directive” means Directive 2010/73/EU.

In addition, in the United Kingdom, this document is being distributed only to, and is directed only at, and any offer subsequently made may only be directed at persons who are “qualified investors” (as defined in the Prospectus Directive) (i) who have professional experience in matters relating to investments falling within Article 19 (5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the “Order”) and/or (ii) who are high net worth companies (or persons to whom it may otherwise be lawfully communicated) falling within Article 49(2)(a) to (d) of the Order and/or (iii) are persons to whom an invitation or inducement to engage in investment activity (within the meaning of section 21 of the Financial Services and Markets Act 2000) in connection with the issue and sale of any notes may otherwise lawfully be communicated or caused to be communicated (all such persons together being referred to as “relevant persons”). This document must not be acted on or relied on in the United Kingdom by persons who are not relevant persons. In the United Kingdom, any investment or investment activity to which this document relates is only available to, and will be engaged in with, relevant persons. Recipients of this prospectus are not permitted to transmit it to any other person. The notes are not being offered to the public in the United Kingdom.

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Legal matters

The validity of the issuance of the notes will be passed upon for us by R.M. Stanton, Esq., Assistant General Counsel—Corporate and Assistant Secretary of U. S. Steel. Mr. Stanton, in his capacity as set forth above, is paid a salary, participates in various employee benefit plans offered by us and owns, and has options to purchase common stock. Morgan, Lewis & Bockius LLP, Pittsburgh, Pennsylvania, will pass upon certain legal matters for us in connection with the issuance of the notes. Simpson Thacher & Bartlett, LLP, New York, New York, will pass upon certain legal matters for the underwriters in connection with the issuance of the notes.

Experts

The consolidated financial statements, financial statement schedule and management’s assessment of the effectiveness of internal control over financial reporting (which is included in Management’s Report on Internal Control over Financial Reporting) incorporated in this prospectus supplement by reference to the Annual Report on Form 10-K for the year ended December 31, 2011 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

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Prospectus

United States Steel Corporation

Senior Debt Securities

Subordinated Debt Securities

Common Stock

Preferred Stock

Depositary Shares

Warrants

Stock Purchase Contracts

Stock Purchase Units

We may from time to time offer and sell senior debt securities, subordinated debt securities, common stock, preferred stock, depositary shares, warrants, stock purchase contracts, stock purchase units or any combination of these securities. The debt securities, preferred stock, warrants and purchase contracts may be convertible into or exercisable or exchangeable for common or preferred stock or other securities or debt or equity securities of one or more other entities.

We may offer and sell these securities to or through one or more underwriters, dealers or agents, directly to other purchasers, on a continuous or delayed basis, or to holders of other securities in exchanges in connection with acquisitions.

This prospectus describes some of the general terms that may apply to these securities. The specific terms of any securities to be offered will be described in a supplement to this prospectus. You should read this prospectus and any prospectus supplement carefully before you invest.

Our common stock is listed on the New York Stock Exchange under the symbol “X.”

Investing in these securities involves certain risks. See the information included and incorporated by reference in this prospectus for a discussion of the factors you should carefully consider before deciding to purchase these securities.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

If you are in a jurisdiction where offers to sell, or solicitations of offers to purchase, the securities offered by this document are unlawful, or if you are a person to whom it is unlawful to direct these types of activities, then the offer presented in this document does not extend to you. The information contained in this document speaks only as of the date of this document, unless the information specifically indicates that another date applies.

The date of this Prospectus is February 24, 2010.

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ABOUT THIS PROSPECTUS

This prospectus is a part of a “shelf” registration statement that we have filed with the Securities and Exchange Commission (the “SEC”). By using a shelf registration statement, we may offer and sell, at any time or from time to time, in one or more offerings, any combination of the securities described in this prospectus. The exhibits to our registration statement contain the full text of certain contracts and other important documents we have summarized in this prospectus. Since these summaries may not contain all the information that you may find important in deciding whether to purchase the securities we offer, you should review the full text of these documents. The registration statement and the exhibits can be obtained from the SEC as indicated under the heading “Where You Can Find More Information.”

This prospectus only provides you with a general description of the securities we may offer. Each time we sell securities, we will provide you with a prospectus supplement that contains specific information about the terms of those securities, including, where applicable, the following:

The prospectus supplement and any “free writing prospectus” that we authorize to be delivered to you may also add, update or change information contained in this prospectus. You should read this prospectus, the prospectus supplement and any free writing prospectus together with the additional information described below under the heading “Where You Can Find More Information.”

Whenever references are made in this prospectus to information that will be included in a prospectus supplement, to the extent permitted by applicable law, rules or regulations, we may instead include such information or add, update or change the information contained in this prospectus by means of a free writing prospectus, post-effective amendment to the registration statement of which this prospectus is a part, through filings we make with the SEC that are incorporated by reference into this prospectus or by any other method as may be then permitted under applicable laws, rules or regulations.

WHERE YOU CAN FIND MORE INFORMATION

United States Steel Corporation files annual, quarterly and current reports, proxy statements and other information with the SEC. You may read and copy any document we file with the SEC at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. Our SEC filings are also accessible through the Internet at the SEC’s website at http://www.sec.gov. Many of our SEC filings are also accessible on our website at http://www.ussteel.com. The reference to our website is intended to be an inactive textual reference only. The information on or connected to our website is not a part of this prospectus or the accompanying prospectus supplement and is not incorporated into this prospectus or any prospectus supplement.

INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

The SEC allows us to “incorporate by reference” into this prospectus the information in documents we file with it, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be a part of this prospectus, and later information that we file with the SEC will update and supersede this information. We incorporate by reference the documents listed

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below and any future filings we make with the SEC under Section 13(a), 13(c), 14, or 15(d) of the Securities Exchange Act of 1934 prior to the termination of the offering under this prospectus (other than any documents or information deemed to have been furnished and not filed in accordance with the SEC rules). These documents contain important information about us. The SEC file number for these documents is 1-16811.

Any statement contained in a document incorporated by reference into this prospectus will be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained herein or in any other subsequently filed document which is also incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded will not be deemed to constitute a part of this prospectus except as so modified or superseded.

We will provide, upon written or oral request, to each person to whom a prospectus is delivered, including any beneficial owner, a copy of any or all of the information that has been incorporated by reference into the prospectus but not delivered with the prospectus. You may request a copy of these filings at no cost.

Requests for documents should be directed to:

United States Steel Corporation

Office of the Secretary

600 Grant Street

Pittsburgh, Pennsylvania 15219-2800

(412) 433-2884

(412) 433-2811 (fax)

FORWARD-LOOKING STATEMENTS

We include “forward-looking” statements concerning trends, market forces, commitments, material events, and other contingencies potentially affecting our future performance in our annual and quarterly reports, press releases and other statements incorporated by reference into this prospectus. These statements include, without limitation, statements regarding our general business strategies; financing decisions; projections of levels of revenues, income from operations, income from operations per ton, net income or earnings per share; levels of capital, environmental or maintenance expenditures; levels of employee benefits; the success or timing of completion of ongoing or anticipated capital or maintenance projects; levels of raw steel production capability; prices; production; shipments; labor and raw material costs; availability of raw materials; the acquisition, idling, shutdown or divestiture of assets or businesses; the effect of restructuring or reorganization of business components and cost reduction programs; the effect of steel industry consolidation; the effect of potential legal proceedings on the business and financial condition; the effects of actions of third parties, such as competitors or foreign, federal, state or local regulatory authorities; the impact of import quotas, tariffs and other protectionist measures; and general economic conditions. These forward-looking statements are based on currently available competitive, financial and economic data and our operating plans and involve risks, uncertainties and assumptions. As a result, these statements are inherently uncertain, and investors must recognize that events could turn out to be significantly different from our expectations. All subsequent written and oral forward-looking statements attributable to us, or persons acting on our behalf, are expressly qualified in their entirety by these cautionary statements. We do not undertake to update our forward-looking statements to reflect future events or circumstances, except as may be required by applicable law. Additional information regarding the risks and uncertainties that could impact our forward-looking statements is contained in our periodic filings with the SEC.

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THE COMPANY

U. S. Steel is an integrated steel producer of flat-rolled and tubular products with major production operations in North America and Europe. An integrated producer uses iron ore and coke as primary raw materials for steel production. U. S. Steel has annual raw steel production capability of 31.7 million net tons (tons) (24.3 million tons in North America and 7.4 million tons in Europe). U. S. Steel is also engaged in other business activities, most of which are related to steelmaking operations, including the production of coke and iron ore pellets, and transportation services (railroad and barge operations), real estate operations and engineering consulting services.

United States Steel Corporation is a Delaware corporation. Our principal offices are at 600 Grant Street, Pittsburgh PA 15219-2800 and our telephone number is (412) 433-1121.

References in this prospectus to the “Registrant,” “Company,” “United States Steel,” “U. S. Steel,” “USS,” “we,” “us” and “our” are to United States Steel Corporation and its subsidiaries.

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RISK FACTORS

Investing in our securities involves risks. You should carefully consider the risks described under “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2009 and in the other documents incorporated by reference into this prospectus (which risk factors are incorporated by reference herein), as well as the other information contained in or incorporated by reference in this prospectus or in any prospectus supplement hereto before making a decision to invest in our securities. See “Where You Can Find More Information.”

RATIO OF EARNINGS TO FIXED CHARGES AND

RATIO OF EARNINGS TO COMBINED FIXED

CHARGES AND PREFERRED STOCK DIVIDENDS

(Unaudited)

Continuing Operations

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USE OF PROCEEDS

The net proceeds from the sale of the offered securities will be used for general corporate purposes unless we specify otherwise in the prospectus supplement or free writing prospectus applicable to a particular offering. General corporate purposes may include the repayment of debt, acquisitions, stock repurchases, capital expenditures, funding employee obligations, investments in subsidiaries and joint ventures, and additions to working capital. Net proceeds may be temporarily invested prior to use.

DESCRIPTION OF THE DEBT SECURITIES

The following is a general description of the debt securities (the “Debt Securities”) that we may offer from time to time. The particular terms of the Debt Securities offered by any prospectus supplement and the extent, if any, to which the general provisions described below may apply will be described in the applicable prospectus supplement. Although our securities include securities denominated in U.S. dollars, we may choose to issue securities in any other currency, including the euro.

The Debt Securities will be either senior Debt Securities or subordinated Debt Securities. We will issue the senior Debt Securities under the senior indenture, dated as of May 21, 2007, between The Bank of New York Mellon, formerly known as The Bank of New York, or any successor trustee, and USS, as supplemented by the First Supplemental Indenture, dated as of May 21, 2007, the Second Supplemental Indenture, dated as of December 10, 2007, and the Third Supplemental Indenture, dated as of May 4, 2009, and as further amended and supplemented from time to time. We will issue the subordinated Debt Securities under a subordinated indenture to be entered into between The Bank of New York Mellon, or any successor trustee, and USS. The senior indenture and the subordinated indenture are collectively referred to in this prospectus as the indentures, and each of the trustee under the senior indenture and the trustee under the subordinated indenture are referred to in this prospectus as the trustee.

The following description is only a summary of the material provisions of the indentures. We urge you to read the appropriate indenture because it, and not this description, defines your rights as a holder of the Debt Securities. See the information under the heading “Incorporation of Certain Information by Reference” to contact us for a copy of the appropriate indenture.

General

The senior Debt Securities will be unsubordinated obligations, will rank on par with all other debt obligations of USS and, unless otherwise indicated in the related prospectus supplement, will be unsecured. The subordinated Debt Securities will be subordinate in right of payment to Senior Indebtedness (as hereinafter defined under the heading “Subordinated Debt Securities—Subordination”). A description of the subordinated Debt Securities is provided below under the heading “Subordinated Debt Securities.” The specific terms of any subordinated Debt Securities will be provided in the related prospectus supplement. For a complete understanding of the provisions pertaining to the subordinated Debt Securities, you should refer to the subordinated indenture attached as an exhibit to this registration statement.

Terms

The indentures do not limit the principal amount of debt we may issue.

We may issue notes or bonds in traditional paper form, or we may issue a global security. The Debt Securities of any series may be issued in definitive form or, if provided in the related prospectus supplement, may be represented in whole or in part by a global security or securities, registered in the name of a depositary designated by USS. Each Debt Security represented by a global security is referred to as a “book-entry security.”

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Debt Securities may be issued from time to time pursuant to this prospectus, and will be offered on terms determined at the time of sale. Debt Securities may be issued in one or more series with the same or various maturities and may be sold at par, a premium or an original issue discount. Debt Securities sold at an original issue discount may bear no interest or interest at a rate that is below market rates. Debt Securities may be denominated in U.S. dollars or other currencies, and unless otherwise provided in the applicable prospectus supplement, Debt Securities denominated in U.S. dollars will be issued in denominations of $1,000 and integral multiples thereof.

Please refer to the applicable prospectus supplement for the specific terms of the Debt Securities offered including the following:

Except with respect to Book-Entry Securities, Debt Securities may be presented for exchange or registration of transfer, in the manner, at the places and subject to the restrictions set forth in the Debt Securities and the applicable prospectus supplement. Such services will be provided without charge, other than any tax or other governmental charge payable in connection therewith, but subject to the limitations provided in the indentures.

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Certain Covenants of USS in the Indentures

Payment

USS will pay principal of and premium, if any, and interest on the Debt Securities at the place and time described in the Debt Securities (Section 10.01). Unless otherwise provided in the applicable prospectus supplement, USS will pay interest on any Debt Security to the person in whose name that security is registered at the close of business on the regular record date for that interest payment (Section 3.07).

Any money deposited with the trustee or any paying agent for the payment of principal of or any premium or interest on any Debt Security that remains unclaimed for two years after that amount has become due and payable will be paid to USS at its request. After this occurs, the holder of that security must look only to USS for payment of that amount and not to the trustee or paying agent (Section 10.03).

Merger and Consolidation

USS will not merge or consolidate with any other entity or sell or convey all or substantially all of its assets to any person, firm, corporation or other entity, except that USS may merge or consolidate with, or sell or convey all or substantially all of its assets to, any other entity if (i) USS is the continuing entity, or the successor entity (if other than USS) is organized and existing under the laws of the United States of America, any State thereof or the District of Columbia, and such entity expressly assumes payment of the principal and interest on all the Debt Securities, and the performance and observance of all of the covenants and conditions of the applicable indenture to be performed by USS and (ii) there is no default under the applicable indenture. Upon such a succession, USS will be relieved from any further obligations under the applicable indenture. For purposes of this paragraph, “substantially all of its assets” means, at any date, a portion of the non-current assets reflected in USS’ consolidated balance sheet as of the end of the most recent quarterly period that represents at least 66-2/3% of the total reported value of such assets (Section 8.01).

Waiver of Certain Covenants

Unless otherwise provided in the applicable prospectus supplement, USS may, with respect to the Debt Securities of any series, omit to comply with any covenant provided in the terms of those Debt Securities if, before the time for such compliance, holders of at least a majority in principal amount of the outstanding Debt Securities of that series waive such compliance in that instance or generally (Section 10.06).

Events of Default

An Event of Default occurs with respect to any series of Debt Securities when: (i) USS defaults in paying interest on the Debt Securities of such series when due, and such default continues for 30 days; (ii) USS defaults in paying principal of or premium, if any, on any of the Debt Securities of such series when due; (iii) USS defaults in making deposits into any sinking fund payment with respect to any Debt Security of such series when due, and such default continues for 30 days; (iv) failure by USS in the performance of any other covenant or warranty in the Debt Securities of such series or in the applicable indenture continues for a period of 90 days after notice of such failure as provided in that indenture; (v) certain events of bankruptcy, insolvency, or reorganization occur; or (vi) any other Event of Default provided with respect to Debt Securities of that series occurs (Section 5.01).

USS is required annually to deliver to the trustee officers’ certificates stating whether or not the signers have any knowledge of any default in the performance by USS of certain covenants (Section 10.04).

If an Event of Default regarding Debt Securities of any series issued under the indentures occurs and is continuing, either the trustee or the holders of not less than 25% in principal amount of the outstanding Debt Securities of such series may declare each Debt Security of that series due and payable (Section 5.02).

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An Event of Default regarding one series of Debt Securities issued under an indenture is not necessarily an Event of Default regarding any other series of Debt Securities.

Holders of a majority in principal amount of the outstanding Debt Securities of any series will be entitled to control certain actions of the trustee under the indentures and to waive certain past defaults regarding such series (Sections 5.12 and 5.13). The trustee generally cannot be required by any of the holders of Debt Securities to take any action, unless one or more of such holders shall have provided to the trustee security or indemnity reasonably satisfactory to it (Section 6.02).

If an Event of Default occurs and is continuing regarding a series of Debt Securities, the trustee may use any sums that it holds under the relevant indenture for its own reasonable compensation and expenses incurred prior to paying the holders of Debt Securities of such series (Section 5.06).

Before any holder of any series of Debt Securities may institute action for any remedy, except payment on such holder’s Debt Security when due, the holders of not less than 25% in principal amount of the outstanding Debt Securities of that series must request the trustee to take action. Holders must also offer and give the trustee satisfactory security and indemnity against liabilities incurred by the trustee for taking such action (Section 5.07).

Modification of the Indentures

Each indenture contains provisions permitting USS and the trustee to modify that indenture or enter into or modify any supplemental indenture without the consent of the holders of the Debt Securities in regard to matters as shall not adversely affect the interests of the holders of the Debt Securities, including, without limitation, the following: (a) to evidence the succession of another corporation to USS; (b) to add to the covenants of USS further covenants for the benefit or protection of the holders of any or all series of Debt Securities or to surrender any right or power conferred upon USS by that indenture; (c) to add any additional events of default with respect to all or any series of Debt Securities; (d) to add to or change any of the provisions of that indenture to facilitate the issuance of Debt Securities in bearer form with or without coupons, or to permit or facilitate the issuance of Debt Securities in uncertificated form; (e) to add to, change or eliminate any of the provisions of that indenture in respect of one or more series of Debt Securities thereunder, under certain conditions designed to protect the rights of any existing holder of those Debt Securities; (f) to secure all or any series of Debt Securities; (g) to establish the forms or terms of the Debt Securities of any series; (h) to evidence the appointment of a successor trustee and to add to or change provisions of that indenture necessary to provide for or facilitate the administration of the trusts under that indenture by more than one trustee; or (i) to cure any ambiguity, to correct or supplement any provision of that indenture which may be defective or inconsistent with another provision of that indenture or to make other amendments that do not adversely affect the interests of the holders of any series of Debt Securities in any material respect (Section 9.01).

USS and the trustee may otherwise modify each indenture or any supplemental indenture with the consent of the holders of not less than a majority in aggregate principal amount of each series of Debt Securities affected thereby at the time outstanding, except that no such modifications shall, without the consent of the holder of each Debt Security affected thereby (i) extend the fixed maturity of any Debt Securities or any installment of interest or premium on any Debt Securities, or reduce the principal amount thereof or reduce the rate of interest or premium payable upon redemption, or reduce the amount of principal of an original issue discount Debt Security or any other Debt Security that would be due and payable upon a declaration of acceleration of the maturity thereof, or change the currency in which the Debt Securities are payable or impair the right to institute suit for the enforcement of any payment after the stated maturity thereof or the redemption date, if applicable, or adversely affect any right of the holder of any Debt Security to require USS to repurchase that security, (ii) reduce the percentage in principal amount of outstanding Debt Securities of any series, the consent of the holders of which is required for any waiver or supplemental indenture, (iii) modify the provisions of that indenture relating to the waiver of past defaults or the waiver or certain covenants or the provisions described under the heading “Modification of the Indentures,” except to increase any percentage set forth in those

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provisions or to provide that other provisions of that indenture may not be modified without the consent of the holder of each Debt Security affected thereby, (iv) change any obligation of USS to maintain an office or agency, (v) change any obligation of USS to pay additional amounts, (vi) adversely affect the right of repayment or repurchase at the option of the Holder, or (vii) reduce or postpone any sinking fund or similar provision (Section 9.02).

Satisfaction and Discharge; Defeasance and Covenant Defeasance

Each indenture shall be satisfied and discharged if (i) USS shall deliver to the trustee all Debt Securities then outstanding for cancellation or (ii) all Debt Securities not delivered to the trustee for cancellation shall have become due and payable, are to become due and payable within one year or are to be called for redemption within one year and USS shall deposit an amount sufficient to pay the principal, premium, if any, and interest to the date of maturity, redemption or deposit (in the case of Debt Securities that have become due and payable), provided that in either case USS shall have paid all other sums payable under that indenture (Section 4.01).

Each indenture provides, if such provision is made applicable to the Debt Securities of a series, (i) that USS may elect either (A) to defease and be discharged from any and all obligations with respect to any Debt Security of such series (except for the obligations to register the transfer or exchange of such Debt Security, to replace temporary or mutilated, destroyed, lost or stolen Debt Securities, to maintain an office or agency in respect of the Debt Securities and to hold moneys for payment in trust) (“defeasance”) or (B) to be released from its obligations with respect to such Debt Security under Section 8.01 of that indenture (being the restrictions described above under the heading “Certain Covenants of USS in the Indentures”) together with additional covenants that may be included for a particular series and (ii) that Sections 5.01(3), 5.01(4) (as to Section 8.01) and 5.01(7), as described in clauses (iii), (iv) and (vi) under “Events of Default,” shall not be Events of Default under that indenture with respect to such series (“covenant defeasance”), upon the deposit with the trustee (or other qualifying trustee), in trust for such purpose, of money, certain U.S. government obligations and/or, in the case of Debt Securities denominated in U.S. dollars, certain state and local government obligations which through the payment of principal and interest in accordance with their terms will provide money, in an amount sufficient to pay the principal of (and premium, if any) and interest on such Debt Security, on the scheduled due dates. In the case of defeasance, the holders of such Debt Securities are entitled to receive payments in respect of such Debt Securities solely from such trust. Such a trust may only be established if, among other things, USS has delivered to the trustee an Opinion of Counsel (as specified in the indentures) to the effect that the holders of the Debt Securities affected thereby will not recognize income, gain or loss for Federal income tax purposes as a result of such defeasance or covenant defeasance and will be subject to Federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such defeasance or covenant defeasance had not occurred. Such Opinion of Counsel, in the case of defeasance under clause (A) above, must refer to and be based upon a ruling of the Internal Revenue Service or a change in applicable Federal income tax law occurring after the date of the indentures (Section 13.04).

Record Dates

The indentures provide that in certain circumstances USS may establish a record date for determining the holders of outstanding Debt Securities of a series entitled to join in the giving of notice or the taking of other action under the applicable indenture by the holders of the Debt Securities of such series.

Subordinated Debt Securities

Although the senior indenture and the subordinated indenture are generally similar and many of the provisions discussed above pertain to both senior and subordinated Debt Securities, there are many substantive differences between the two. This section discusses some of those differences.

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Subordination

Subordinated Debt Securities will be subordinate, in right of payment, to all Senior Indebtedness. “Senior Indebtedness” is defined to mean, with respect to USS, the principal, premium, if any, and interest, fees, charges, expenses, reimbursement obligations, guarantees and other amounts owing with respect to all indebtedness of USS (including indebtedness of others guaranteed by USS), whether outstanding on the date of the indenture or the date Debt Securities of any series are issued under the indenture or thereafter created, incurred or assumed, unless, in any case, in the instrument creating or evidencing any such indebtedness or obligation, or pursuant to which the same is outstanding, it is provided that such indebtedness or obligation is not superior in right of payment to the subordinated Debt Securities or that such obligation is subordinated to Senior Indebtedness to substantially the same extent as the subordinated Debt Securities are subordinated to Senior Indebtedness.

Terms of Subordinated Debt Securities may contain Conversion or Exchange Provisions

The prospectus supplement applicable to a particular series of subordinated Debt Securities will describe the specific terms discussed above that apply to the subordinated Debt Securities being offered thereby as well as any applicable conversion or exchange provisions.

Modification of the Indenture Relating to Subordinated Debt Securities

The subordinated indenture may be modified by USS and the trustee without the consent of the Holders of the subordinated Debt Securities for one or more of the purposes discussed above under the heading “Modification of the Indentures.” USS and the trustee may also modify the subordinated indenture to make provision with respect to any conversion or exchange rights for a given issue of subordinated Debt Securities.

Governing Law

The laws of the State of New York govern each indenture and will govern the Debt Securities (Section 1.12).

Book-Entry Securities

The following description of book-entry securities will apply to any series of Debt Securities issued in whole or in part in the form of one or more global securities, except as otherwise described in the applicable prospectus supplement.

Book-entry securities of like tenor and having the same date will be represented by one or more global securities deposited with and registered in the name of a depositary that is a clearing agent registered under the Exchange Act. Beneficial interests in book-entry securities will be limited to institutions that have accounts with the depositary (“participants”) or persons that may hold interests through participants. Ownership of beneficial interests by participants will only be evidenced by, and the transfer of that ownership interest will only be effected through, records maintained by the depositary. Ownership of beneficial interests by persons that hold through participants will only be evidenced by, and the transfer of that ownership interest within such participant will only be effected through, records maintained by the participants. The laws of some jurisdictions require that certain purchasers of securities take physical delivery of such securities in definitive form. Such laws may impair the ability to transfer beneficial interests in a global security.

Payment of principal of and any premium and interest on book-entry securities represented by a global security registered in the name of or held by a depositary will be made to the depositary, as the registered owner of the global security. Neither USS, the trustee nor any agent of USS or the trustee will have any responsibility or liability for any aspect of the depositary’s records or any participant’s records relating to or payments made on

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account of beneficial ownership interests in a global security or for maintaining, supervising or reviewing any of the depositary’s records or any participant’s records relating to the beneficial ownership interests. Payments by participants to owners of beneficial interests in a global security held through such participants will be governed by the depositary’s procedures, as is now the case with securities held for the accounts of customers registered in “street name,” and will be the sole responsibility of such participants.

A global security representing a book-entry security is exchangeable for definitive Debt Securities in registered form, of like tenor and of an equal aggregate principal amount registered in the name of, or is transferable in whole or in part to, a person other than the depositary for that global security, only if (a) the depositary notifies USS that it is unwilling or unable to continue as depositary for that global security or the depositary ceases to be a clearing agency registered under the Exchange Act, (b) there shall have occurred and be continuing an Event of Default with respect to the Debt Securities of that series or (c) other circumstances exist that have been specified in the terms of the Debt Securities of that series. Any global security that is exchangeable pursuant to the preceding sentence shall be registered in the name or names of such person or persons as the depositary shall instruct the trustee. It is expected that such instructions may be based upon directions received by the depositary from its participants with respect to ownership of beneficial interests in such global security.

Except as provided above, owners of beneficial interests in a global security will not be entitled to receive physical delivery of Debt Securities in definitive form and will not be considered the holders thereof for any purpose under the indentures, and no global security shall be exchangeable, except for a security registered in the name of the depositary. This means each person owning a beneficial interest in such global security must rely on the procedures of the depositary and, if such person is not a participant, on the procedures of the participant through which such person owns its interest, to exercise any rights of a holder under the indentures. USS understands that under existing industry practices, if USS requests any action of holders or an owner of a beneficial interest in such global security desires to give or take any action that a holder is entitled to give or take under the indentures, the depositary would authorize the participants holding the relevant beneficial interests to give or take such action, and such participants would authorize beneficial owners owning through such participant to give or take such action or would otherwise act upon the instructions of beneficial owners owning through them.

Concerning the Trustee

The Bank of New York Mellon is also trustee for our 5.65% Senior Notes due June 1, 2013, our 6.05% Senior Notes due June 1, 2017, our 6.65% Senior Notes due June 1, 2037, our 7.00% Senior Notes due February 1, 2018, our 4.00% Senior Convertible Notes due May 15, 2014, a leveraged lease in which USS is the lessee and several series of obligations issued by various governmental authorities relating to environmental projects at various USS facilities. The Bank of New York Mellon is a lender under our revolving credit facility. USS and its subsidiaries also maintain ordinary banking relationships, including loans and deposit accounts, with The Bank of New York Mellon and its affiliates and anticipate that they will continue to do so. John P. Surma, our Chairman and Chief Executive Officer, is a director of the parent corporation of The Bank of New York Mellon.

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DESCRIPTION OF CAPITAL STOCK

The following is a description of the material terms of the capital stock of USS included in its certificate of incorporation, but it is not complete. This description is qualified by reference to the certificate of incorporation, and the Rights Agreement (the “Rights Agreement”) between USS and Mellon Investor Services LLC, as Rights Agent (the “Rights Agent”), that have been filed as exhibits to the registration statement of which this prospectus is a part. The terms of these securities may also be affected by the Delaware General Corporation Law.

General

The authorized capital stock of USS consists of 40 million shares of preferred stock, without par value, and 400 million shares of common stock with a par value of $1.00 per share. As of February 22, 2010, there were no shares of preferred stock outstanding and 143,370,146 shares of common stock outstanding.

Preferred Stock

The preferred stock may be issued without the approval of the holders of common stock in one or more series, from time to time. The designation, powers, preferences and relative participating, optional or other special rights, and qualifications, limitations or restrictions of any preferred stock will be stated in a resolution providing for the issue of that series adopted by our board of directors and will be described in the appropriate prospectus supplement (if any), including the following:

Holders of preferred stock will be entitled to receive dividends (other than dividends of common stock) before any dividends are payable to holders of common stock.

The future issuance of preferred stock may have the effect of delaying, deferring or preventing a change in control of USS.

Common Stock

The holders of common stock will be entitled to receive dividends when, as and if declared by the USS board of directors out of funds legally available therefor, subject to the rights of any shares of preferred stock at the time outstanding. The holders of common stock will be entitled to one vote for each share on all matters voted on generally by stockholders under our certificate of incorporation, including the election of directors. Holders of common stock do not have any cumulative voting, conversion, redemption or preemptive rights. In the event of dissolution, liquidation or winding up of USS, holders of the common stock will be entitled to share ratably in any assets remaining after the satisfaction in full of the prior rights of creditors, including holders of

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any then outstanding indebtedness, and subject to the aggregate liquidation preference and participation rights of any preferred stock then outstanding. The issuance of additional shares of authorized stock by USS may occur at such times and under such circumstances as to have a dilutive effect on earnings per share and on the equity ownership of the holders of common stock.

Stock Transfer Agent and Registrar

Wells Fargo Bank, N.A., 161 N. Concord Exchange, South St. Paul, MN 55075-1139, serves as transfer agent and registrar for the common stock and preferred stock of USS.

Rights Plan

The following is a brief description of the terms of the stockholders rights plan (the “Rights”) set forth in the Rights Agreement.

The purpose of the Rights Agreement is to:

The exercise of the Rights would cause substantial dilution to a person attempting to acquire USS on terms not approved by our board of directors and would therefore significantly increase the price that person would have to pay to complete the acquisition. The Rights Agreement may deter a potential acquisition or tender offer.

Under the Rights Agreement, the Right to purchase from USS one-hundredth of a share of Series A Junior Preferred Stock, no par value (the “Junior Preferred Stock”), at a purchase price of $110 in cash, subject to adjustment, is attached to each share of common stock.

The Rights will expire at the close of business on December 31, 2011, unless that date is extended or the Rights are earlier redeemed or exchanged by USS as described below.

Until the Rights are distributed, they will:

If the Rights are distributed, they will become exercisable, and USS would issue separate certificates representing the Rights, which would trade separately from USS’ common stock.

The Rights would be distributed upon the earlier of

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However, an “Acquiring Person” will not include USS, any of its subsidiaries, any of its employee benefit plans or any person organized pursuant to those employee benefit plans or a person acquiring pursuant to a Qualifying Offer. The Rights Agreement also contains provisions designed to prevent the inadvertent triggering of the Rights by institutional or certain other stockholders.

If a person or group becomes the beneficial owner of common stock representing 15% or more of the total voting power of all outstanding shares of common stock (except pursuant to a Qualifying Offer), the Rights “flip-in” and entitle each holder of a Right (other than the Acquiring Person and certain related parties) to receive, upon exercise, common stock (or in certain circumstances, cash, property, or other securities of USS), having a value equal to two times the exercise price of the Right. However, Rights are not exercisable until such time as the Rights are no longer redeemable by USS as set forth below.

If at any time following the Stock Acquisition Date, (i) USS consolidates with, or merges with and into, any other person in a transaction in which USS is not the surviving corporation (other than a merger that follows a Qualifying Offer) or another person consolidates with, or merges with or into, USS and USS’ common stock is changed into or exchanged for securities of another person or cash or other property, or (ii) 50% or more of USS’ assets, earning power or cash flow is sold or transferred, the Rights “flip-over” and entitle each holder of a Right (other than an Acquiring Person and certain related parties) to receive, upon exercise, common stock of the acquiring company having a value equal to two times the exercise price of the Right.

USS reserves the right, before the occurrence of an event described in the two preceding paragraphs, to require that upon an exercise of Rights, a number of Rights be exercised so that only whole shares of Junior Preferred Stock would be issued.

At any time until the earlier of 10 business days following the Stock Acquisition Date and December 31, 2011 (subject to extension), USS may redeem the Rights in whole, but not in part, at a price of $.01 per whole Right payable in stock or cash or any other form of consideration deemed appropriate by its board of directors (the “Redemption Price”). Immediately upon the action of the board of directors ordering redemption of the Rights, the Rights will terminate and the holders of the Rights will have only the right to receive the Redemption Price.

The board of directors may, at its option, at any time after any person becomes an Acquiring Person, exchange all or part of the outstanding and exercisable Rights (other than Rights held by the Acquiring Person and certain related parties) for shares of common stock at an exchange ratio of one share of common stock for each Right (subject to certain anti-dilution adjustments). However, the board of directors may not effect such an exchange at any time any person or group beneficially owns common stock representing 50% or more of the total voting power of the common stock then outstanding. Immediately after the board of directors orders such an exchange, the right to exercise the Rights will terminate, and the holders of the Rights will have only the right to receive shares of common stock at the exchange ratio.

As long as the Rights are attached to shares of common stock, USS will issue Rights on each share of common stock issued prior to the earlier of the rights distribution date and the expiration date of the Rights so that all such shares will have attached Rights.

A holder of Rights will not, as such, have any rights as a shareholder of USS, including rights to vote or receive dividends.

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The purchase price payable upon exercise of the Rights is subject to adjustment from time to time to prevent dilution, subject to the qualifications set forth in the Rights Agreement:

At any time prior to the distribution of the Rights, the board of directors may amend any provision of the Rights Agreement. After the distribution of the Rights, the board of directors may amend the provisions of the Rights Agreement in order to:

provided, that no amendment may be made when the Rights are not redeemable.

The distribution of the Rights will not be taxable to USS or its stockholders. A stockholder may recognize taxable income in the event that the Rights become exercisable for common stock (or other consideration) of USS or common stock of an acquiring company.

This description is only a summary of the material provisions of the Rights Agreement. We urge you to read the Rights Agreement because it, and not this description, defines your rights as holders of Rights. A copy of the Rights Agreement is available free of charge from the Rights Agent by writing to Mellon Investor Services, LLC at 500 Grant Street, Room 2122, Pittsburgh, Pennsylvania 15219 or from USS (see “Incorporation of Certain Information by Reference”).

Delaware Law, Our Certificate of Incorporation and By-Laws Contain Provisions That May Have an Anti-Takeover Effect

Certain provisions of Delaware law and our certificate of incorporation could make more difficult or delay a change in control of USS by means of a tender offer, a proxy contest or otherwise and the removal of incumbent directors. These provisions are intended to discourage certain types of coercive takeover practices and inadequate takeover bids, even though such a transaction may offer our stockholders the opportunity to sell their stock at a price above the prevailing market price. Our board of directors believes that these provisions are appropriate to protect the interests of USS and of its stockholders.

Delaware Law. We are governed by the provisions of Section 203 of the Delaware General Corporation Law. In general, Section 203 prohibits a public Delaware corporation from engaging in a “business combination” with an “interested stockholder” for a period of three years following the time that the person became an interested stockholder, unless:

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A “business combination” includes mergers, asset sales or other transactions resulting in a financial benefit to the stockholder. An “interested stockholder” is a person who, together with affiliates and associates, owns (or within three years did own) 15% or more of the corporation’s voting stock.

Certificate of Incorporation and By-Laws. Our certificate of incorporation provides that our board of directors is classified into three classes of directors, each class consisting of approximately one-third of the directors. Each director serves a three-year term, with a different class of directors up for election each year. Under Delaware law, directors of a corporation with a classified board may be removed only for cause unless the corporation’s certificate of incorporation provides otherwise. Our certificate of incorporation does not provide otherwise. Board classification could prevent a party who acquires control of a majority of USS’ outstanding voting stock from obtaining control of our board of directors until the second annual stockholders’ meeting following the date that party obtains control.

Our certificate of incorporation also provides that any action required or permitted to be taken by its stockholders must be effected at a duly called annual or special meeting and may not be taken by written consent.

Our by-laws provide that special meetings of stockholders may be called only by the board of directors and not by the stockholders. Our by-laws include advance notice and informational requirements and time limitations on any director nomination or any new proposal that a stockholder wishes to make at a meeting of stockholders. In general, a stockholder’s notice of a director nomination or proposal will be timely if delivered or mailed to our Secretary at our principal executive offices not less than 90 days and not more than 120 days prior to the first anniversary of the date of the preceding year’s annual meeting of stockholders or, in certain situations, within 10 days following the announcement of the date of the meeting. These provisions may preclude stockholders from bringing matters before a meeting or from making nominations for directors at these meetings.

Our certificate of incorporation and by-laws do not include a provision for cumulative voting for directors.

Our certificate of incorporation provides for the issuance of preferred stock, at the discretion of our board of directors, from time to time, in one or more series, without further action by our stockholders, unless approval of our stockholders is deemed advisable by our board of directors or required by applicable law, regulation or stock exchange listing requirements. In addition, our authorized but unissued shares of our common stock will be available for issuance from time to time at the discretion of our board of directors without the approval of our stockholders, unless such approval is deemed advisable by our board of directors or required by applicable law, regulation or stock exchange listing requirements. One of the effects of the existence of authorized, unissued and unreserved shares of our common stock and preferred stock could be to enable our board of directors to issue shares to persons friendly to current management that could render more difficult or discourage an attempt to obtain control of USS by means of a merger, tender offer, proxy contest or otherwise, and thereby protect the continuity of our management. Such additional shares also could be used to dilute the stock ownership of persons seeking to obtain control of USS.

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Our certificate of incorporation provides that vacancies in our board of directors may be filled only by the affirmative vote of a majority of the remaining directors. The certificate of incorporation also provides that directors may be removed from office only with cause. These provisions preclude stockholders from removing directors without cause and filling vacancies with their own nominees.

Certain provisions described above may have the effect of delaying stockholder actions with respect to certain business combinations. As such, the provisions could have the effect of discouraging open market purchases of shares of our common stock because such provisions may be considered disadvantageous by a stockholder who desires to participate in a business combination.

Limitations of Liability and Indemnification Matters

Our certificate of incorporation provides that a director is not personally liable to us or our stockholders for monetary damages for any breach of fiduciary duty as a director, except (1) for breach of the director’s duty of loyalty to us and our stockholders, (2) for acts and omissions not in good faith or that involve intentional misconduct or a knowing violation of law, (3) under Section 174 of the Delaware General Corporation Law or (4) for any transaction from which the director derived an improper personal benefit. These provisions of our certificate of incorporation are intended to afford directors protection, and limit their potential liability, to the fullest extent permitted by Delaware law. Because of these provisions, stockholders may be unable to recover monetary damages against directors for actions taken by them that constitute negligence or gross negligence or that are in violation of some of their fiduciary duties. These provisions do not affect a director’s responsibilities under any other laws, such as the federal securities laws.

In addition, our by-laws provide that we will indemnify our directors and officers to the fullest extent permitted by law.

We have obtained directors’ and officers’ insurance for our directors and officers for specified liabilities.

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DESCRIPTION OF DEPOSITARY SHARES

The following briefly summarizes the material provisions of the deposit agreement and of the depositary shares and depositary receipts, other than pricing and related terms disclosed for a particular issuance in the applicable prospectus supplement. You should read the particular terms of any depositary shares and any depositary receipts that we offer and any deposit agreement relating to a particular series of preferred stock that will be described in more detail in the applicable prospectus supplement. The applicable prospectus supplement will also state whether any of the generalized provisions summarized below do not apply to the depositary shares or depositary receipts being offered. A copy of the form of deposit agreement, including the form of depositary receipt, is incorporated by reference as an exhibit in the registration statement of which this prospectus forms a part. You can obtain copies of these documents by following the directions under the caption “Incorporation of Certain Information by Reference.” You should read the more detailed provisions of the deposit agreement and the form of depositary receipt for provisions that may be important to you.

General

USS may, at its option, elect to offer fractional shares of preferred stock, rather than full shares of preferred stock. In such event, we will issue receipts for depositary shares, each of which will represent a fraction of a share of a particular series of preferred stock.

The shares of any series of preferred stock represented by depositary shares will be deposited under a deposit agreement between USS and a bank or trust company selected by USS having its principal office in the United States and having a combined capital and surplus of at least $50 million, as preferred stock depositary. Each owner of a depositary share will be entitled to all the rights and preferences of the underlying preferred stock, including dividend, voting, redemption, conversion and liquidation rights, in proportion to the applicable fraction of a share of preferred stock represented by such depositary share.

The depositary shares will be evidenced by depositary receipts issued pursuant to the deposit agreement. Depositary receipts will be distributed to those persons purchasing the fractional shares of preferred stock in accordance with the terms of the applicable prospectus supplement.

Dividends and Other Distributions

The preferred stock depositary will distribute all cash dividends or other cash distributions received in respect of the deposited preferred stock to the record holders of depositary shares relating to such preferred stock in proportion to the number of such depositary shares owned by such holders.

The preferred stock depositary will distribute any property received by it other than cash to the record holders of depositary shares entitled thereto. If the preferred stock depositary determines that it is not feasible to make such distribution, it may, with the approval of USS, sell such property and distribute the net proceeds from such sale to such holders.

Redemption of Preferred Stock

If a series of preferred stock represented by depositary shares is to be redeemed, the depositary shares will be redeemed from the proceeds received by the preferred stock depositary resulting from the redemption, in whole or in part, of such series of preferred stock. The depositary shares will be redeemed by the preferred stock depositary at a price per depositary share equal to the applicable fraction of the redemption price per share payable in respect of the shares of preferred stock so redeemed.

Whenever USS redeems shares of preferred stock held by the preferred stock depositary, the preferred stock depositary will redeem as of the same date the number of depositary shares representing shares of preferred stock so redeemed. If fewer than all the depositary shares are to be redeemed, the depositary shares to be redeemed will be selected by the preferred stock depositary by lot or ratably as the preferred stock depositary may decide.

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Voting Deposited Preferred Stock

Upon receipt of notice of any meeting at which the holders of any series of deposited preferred stock are entitled to vote, the preferred stock depositary will mail the information contained in such notice of meeting to the record holders of the depositary shares relating to such series of preferred stock. Each record holder of such depositary shares on the record date will be entitled to instruct the preferred stock depositary to vote the amount of the preferred stock represented by such holder’s depositary shares. The preferred stock depositary will try to vote the amount of such series of preferred stock represented by such depositary shares in accordance with such instructions.

USS will agree to take all actions that the preferred stock depositary determines are necessary to enable the preferred stock depositary to vote as instructed. The preferred stock depositary will abstain from voting shares of any series of preferred stock held by it for which it does not receive specific instructions from the holders of depositary shares representing such shares.

Amendment and Termination of the Deposit Agreement

The form of depositary receipt evidencing the depositary shares and any provision of the deposit agreement may at any time be amended by agreement between USS and the preferred stock depositary. However, any amendment that materially and adversely alters any existing right of the holders of depositary shares (other than certain changes in the fees of the preferred stock depositary) will not be effective unless such amendment has been approved by the holders of at least a majority of the depositary shares then outstanding. Every holder of an outstanding depositary receipt at the time any such amendment becomes effective shall be deemed, by continuing to hold such depositary receipt, to consent and agree to such amendment and to be bound by the deposit agreement, as amended thereby. The deposit agreement may be terminated only if:

Charges of Preferred Stock Depositary, Taxes and Other Government Charges

USS will pay all transfer and other taxes and governmental charges arising solely from the existence of the depositary arrangements. USS also will pay charges of the depositary in connection with the initial deposit of preferred stock and any redemption of preferred stock. Holders of depositary receipts will pay other transfer and other taxes and governmental charges and such other charges, including a fee for the withdrawal of shares of preferred stock upon surrender of depositary receipts, as are expressly provided in the deposit agreement to be for their accounts.

Appointment, Resignation and Removal of Depositary

USS will appoint the preferred stock depository. The preferred stock depositary may resign at any time by delivering to USS notice of its intent to do so and USS may at any time remove the preferred stock depositary, any such resignation or removal to take effect upon the appointment of a successor preferred stock depositary and its acceptance of such appointment. Such successor preferred stock depositary must be appointed within 60 days after delivery of the notice of resignation or removal and must be a bank or trust company having its principal office in the United States and having a combined capital and surplus of at least $50 million.

Miscellaneous

USS will transmit to the record holders of depositary shares all notices and reports that USS is required to furnish to the holders of the depositary shares.

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Neither the preferred stock depositary nor USS will be liable under the deposit agreement other than for its negligence or willful misconduct. The preferred stock depositary and USS will not be obligated to prosecute or defend any legal proceeding in respect of any depositary shares, depositary receipts or shares of preferred stock unless satisfactory indemnity is furnished. USS and the preferred stock depositary may rely upon written advice of counsel or accountants, or upon information provided by holders of depositary receipts or other persons believed to be competent and on documents believed to be genuine. The preferred stock depositary will not be responsible for any failure to carry out any instruction to vote any shares of preferred stock, as long as that action or non-action is in good faith.

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DESCRIPTION OF WARRANTS

USS may issue Warrants for the purchase of Debt Securities, preferred stock or common stock (each a “USS Security,” and together the “USS Securities”). Warrants may be issued independently or together with any USS Security offered by any prospectus supplement and may be attached to or separate from any such USS Security. Each series of Warrants will be issued under a separate warrant agreement (a “Warrant Agreement”) to be entered into between USS and a bank or trust company, as warrant agent (the “Warrant Agent”). The Warrant Agent will act solely as an agent of USS in connection with the Warrants and will not assume any obligation or relationship of agency or trust for or with any holders or beneficial owners of Warrants. The following summary of certain provisions of the Warrants does not purport to be complete and is subject to, and qualified in its entirety by reference to, the provisions of the Warrant Agreement that will be filed with the SEC in connection with the offering of such Warrants.

Debt Warrants

The prospectus supplement relating to a particular issue of Warrants to purchase Debt Securities (“Debt Warrants”) will describe the terms of such Debt Warrants, including the following (if applicable): (a) the title of such Debt Warrants; (b) the offering price for such Debt Warrants; (c) the aggregate number of such Debt Warrants; (d) the designation and terms of the Debt Securities purchasable upon exercise of such Debt Warrants; (e) the designation and terms of the Debt Securities with which such Debt Warrants are issued and the number of such Debt Warrants issued with each such Debt Security; (f) the date from and after which such Debt Warrants and any Debt Securities issued therewith will be separately transferable; (g) the principal amount of Debt Securities purchasable upon exercise of a Debt Warrant and the price at which such principal amount of Debt Securities may be purchased upon exercise (which price may be payable in cash, securities, or other property); (h) the date on which the right to exercise such Debt Warrants shall commence and the date on which such right shall expire; (i) the minimum or maximum amount of such Debt Warrants that may be exercised at any one time; (j) whether the Debt Warrants represented by the Debt Warrant certificates, or Debt Securities that may be issued upon exercise of the Debt Warrants, will be issued in registered or bearer form; (k) information with respect to book-entry procedures; (l) the currency or currency units in which the offering price and the exercise price are payable; (m) a discussion of material United States federal income tax considerations; (n) the redemption or call provisions applicable to such Debt Warrants; and (o) any additional terms of the Debt Warrants, including terms, procedures, and limitations relating to the exchange and exercise of such Debt Warrants.

Stock Warrants

The prospectus supplement relating to any particular issue of Warrants to purchase preferred stock, depositary shares representing fractional shares of preferred stock or common stock (“Stock Warrants”) will describe the terms of such Stock Warrants, including the following (if applicable): (a) the title of such Stock Warrants; (b) the offering price for such Stock Warrants; (c) the aggregate number of such Stock Warrants; (d) the designation and terms of the preferred stock or common stock purchasable upon exercise of such Stock Warrants; (e) the designation and terms of the USS Securities with which such Stock Warrants are issued and the number of such Stock Warrants issued with each such USS Security; (f) the date from and after which such Stock Warrants and any USS Securities issued therewith will be separately transferable; (g) the number of shares of preferred stock or common stock purchasable upon exercise of a Warrant and the price at which such shares may be purchased upon exercise; (h) the date on which the right to exercise such Stock Warrants shall commence and the date on which such right shall expire; (i) the minimum or maximum amount of such Stock Warrants that may be exercised at any one time; (j) the currency or currency units in which the offering price and the exercise price are payable; (k) a discussion of material United States federal income tax considerations; (l) the anti-dilution provisions of such Stock Warrants; (m) the redemption or call provisions applicable to such Stock Warrants; and (n) any additional terms of the Stock Warrants, including terms, procedures, and limitations relating to the exchange and exercise of such Stock Warrants.

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DESCRIPTION OF CONVERTIBLE OR EXCHANGEABLE SECURITIES

If any Debt Security, preferred stock, depositary shares representing fractional shares of preferred stock or Warrant is converted or exchanged into any other security the conversion or exchange terms thereof will be set forth in the prospectus supplement issued for the sale of such convertible or exchangeable security. These terms will include some or all of the terms described for Warrants.

DESCRIPTION OF STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS

USS may issue stock purchase contracts, including contracts obligating holders to purchase from us, and us to sell to holders, a specified number of shares of common stock at a future date or dates. The obligations to purchase and sell may be absolute or may be contingent upon specified events. The consideration per share of common stock may be fixed at the time the stock purchase contracts are issued or may be determined by reference to a specific formula described in the stock purchase contracts. USS may issue the stock purchase contracts separately or as a part of stock purchase units consisting of a stock purchase contract and one or more shares of our preferred stock or debt securities or debt obligations of third parties (including U.S. Treasury securities) securing the holders’ obligations to purchase the shares of common stock under the stock purchase contracts. The stock purchase contracts may require us to make periodic payments to the holders of stock purchase units or vice-versa. These payments may be unsecured or pre-funded on some basis. The stock purchase contracts may require holders to secure their obligations in a specified manner. The applicable prospectus supplement will describe the specific terms of any stock purchase contracts or stock purchase units.

PLAN OF DISTRIBUTION

We may offer the offered securities in one or more of the following ways from time to time:

The prospectus supplement for each series of securities we sell will describe the offering, including:

Underwriters

If underwriters are used in a sale, we will execute an underwriting agreement with them regarding those securities. Unless otherwise described in the prospectus supplement, the obligations of the underwriters to purchase these securities will be subject to conditions, and the underwriters must purchase all of these securities if any are purchased.

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The securities subject to the underwriting agreement may be acquired by the underwriters for their own account and may be resold by them from time to time in one or more transactions, including negotiated transactions, at a fixed offering price or at varying prices determined at the time of sale. Underwriters may be deemed to have received compensation from us in the form of underwriting discounts or commissions and may also receive commissions from the purchasers of these securities for whom they may act as agent. Underwriters may sell these securities to or through dealers. These dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters and/or commissions from the purchasers for whom they may act as agent. Any initial offering price and any discounts or concessions allowed or reallowed or paid to dealers may be changed from time to time.

We may authorize underwriters to solicit offers by institutions to purchase the securities subject to the underwriting agreement from us, at the public offering price stated in the prospectus supplement under delayed delivery contracts providing for payment and delivery on a specified date in the future. If we sell securities under these delayed delivery contracts, the prospectus supplement will state that this is the case and will describe the conditions to which these delayed delivery contracts will be subject and the commissions payable for that solicitation.

In connection with underwritten offerings of the securities, the underwriters may engage in over-allotment, stabilizing transactions, covering transactions and penalty bids in accordance with Regulation M under the Securities Exchange Act of 1934, as follows:

These stabilizing transactions, covering transactions and penalty bids may cause the price of the securities to be higher than it would otherwise be in the absence of these transactions. If these transactions occur, they may be discontinued at any time.

Agents

We may also sell any of the securities through agents designated by us from time to time. We will name any agent involved in the offer or sale of these securities and will list commissions payable by us to these agents in the prospectus supplement. These agents will be acting on a best efforts basis to solicit purchases for the period of its appointment, unless we state otherwise in the prospectus supplement.

Direct Sales

We may sell any of the securities directly to purchasers. In this case, we will not engage underwriters or agents in the offer and sale of these securities.

In addition, debt securities or shares of common stock or preferred stock may be issued upon the exercise of warrants.

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Indemnification

We may indemnify underwriters, dealers or agents who participate in the distribution of securities against certain liabilities, including liabilities under the Securities Act of 1933, and may agree to contribute to payments that these underwriters, dealers or agents may be required to make.

No Assurance of Liquidity

The securities we offer may be a new issue of securities with no established trading market. Any underwriters that purchase securities from us may make a market in these securities. The underwriters will not be obligated, however, to make a market and may discontinue market-making at any time without notice to holders of the securities. We cannot assure you that there will be liquidity in the trading market for any securities of any series.

LEGAL MATTERS

Unless otherwise specified in the prospectus supplement accompanying this prospectus, the validity of the issuance of the offered securities will be passed upon for USS by R.M. Stanton, Esq., Assistant General Counsel — Corporate and Assistant Secretary of USS. Mr. Stanton, in his capacity as set forth above, is paid a salary by USS, participates in various employee benefit plans offered by USS and owns, and has options to purchase, common stock of USS. Any underwriters will also be advised about the validity of the securities and other legal matters by their own counsel, which will be named in the prospectus supplement.

EXPERTS

The consolidated financial statements, financial statement schedule and management’s assessment of the effectiveness of internal control over financial reporting (which is included in Management’s Reports to Stockholders) incorporated in this prospectus by reference to the Annual Report on Form 10-K for the year ended December 31, 2009 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

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