Exhibit 5

United States Steel Corporation                  Robert M. Stanton
Law Department                                   Assistant General Counsel-
600 Grant Street                                 Corporate & Assistant Secretary
Pittsburgh, PA  15219-2800
412 433 2877
Fax:  412 433 2811
email:  rmstanton@uss.com


                                        March 28, 2002


Board of Directors
United States Steel Corporation
600 Grant Street
Pittsburgh, PA 15219-2800

Ladies and Gentlemen:

I am Assistant General Counsel--Corporate and Assistant Secretary of USX
Corporation, a Delaware corporation (hereinafter the "Corporation"), and have
served as counsel to the Corporation in connection with the registration
statement on Form S-4 (hereinafter the "Registration Statement") for the
proposed issuance of up to an aggregate of $535,000,000 principal amount of the
Corporation's 10 3/4 %Senior Notes due August 1, 2008 (the "Exchange Notes") to
be issued in exchange for the Corporation's currently outstanding 10 3/4 %
Senior Notes due August 1, 2008 (the "Original Notes").

As Assistant General Counsel, I am familiar with the Corporation's Certificate
of Incorporation and its By-laws. I have also examined, or caused those acting
under my supervision to have examined, the resolutions adopted by the Board of
Directors of United States Steel LLC, predecessor by conversion to the
Corporation, dated July 20, 2001; the resolutions adopted by the Special
Committee appointed by the Board of Directors of United States Steel LLC dated
July 20, 2002; the Registration Statement; the Indenture between the Corporation
and Bank of New York, as trustee pursuant to which the Exchange Notes will be
issued (the "Indenture"); and such other records and documents, including
certificates of government officials and corporate officers, that I have deemed
necessary or desirable in rendering the opinion set forth below. In rendering
such opinion I have presumed the genuineness of all documents examined and the
accuracy of all statements of fact contained therein.

Based upon the foregoing, I am of the opinion that when the Exchange Notes have
been duly authorized and are executed and authenticated in accordance with the
terms of the Indenture and delivered to holders against receipt of like tenor of
Original Notes, the Exchange Notes will be legal, valid and binding obligations
of the Corporation enforceable against it in accordance with the terms thereof
except as enforcement of such obligations may be limited by (a) bankruptcy,
insolvency, reorganization, moratorium or similar laws affecting the enforcement
of creditor's rights generally; (b) general equitable principles concerning
specific performance and other equitable remedies; (c) the possible refusal of a
court to enforce any provision of the Indenture purporting to disallow waivers
by course of conduct or oral

Board of Directors
United States Steel Corporation
March 28, 2002
Page 2

authorization or to excuse failure to act or delay in acting by any party and
(d) general matters of public policy.

I hereby consent to the filing of this opinion as an exhibit to the Registration
Statement.


                                                           Very truly yours,


                                                           /s/ Robert M. Stanton

                                                           Robert M. Stanton