UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C.  20549


                             -----------------------

                                    FORM 8-K

                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       The Securities Exchange Act of 1934

                             -----------------------

                Date of Report (Date of earliest event reported):
                                December 12, 2006


                         United States Steel Corporation
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             (Exact name of registrant as specified in its charter)


       Delaware                1-16811               25-1897152
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   (State or other        (Commission File          (IRS Employer
   jurisdiction of             Number)           Identification No.)
    incorporation)

       600 Grant Street, Pittsburgh, PA              15219-2800
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       (Address of principal executive               (Zip Code)
                   offices)

                                 (412) 433-1121
                         ------------------------------
                         (Registrant's telephone number,
                              including area code)

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Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

[  ] Written communications pursuant to Rule 425 under the Securities Act (17
     CFR 230.425)

[  ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
     240.14a-12)

[  ] Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[  ] Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))

 2

Item 3.03  Material Modification to Rights of Security Holders

United  States Steel Corporation (the "Company") and The Bank of  New  York,  as
trustee (the "Trustee"), are parties to an Indenture dated as of July 27,  2001,
as  amended  and supplemented by the First Supplemental Indenture  dated  as  of
November 26, 2001 and the Second Supplemental Indenture dated as of May 20, 2003
(as  amended and supplemented the "Indenture").  The Company issued its  10-3/4%
Senior Notes due 2008 (the "Notes") pursuant to the Indenture.

On  November 29, 2006, the Company commenced a cash tender offer for  the  Notes
(the  "Offer").   Concurrently  with  the  Offer,  the  Company  commenced   the
solicitation  of consents to certain proposed amendments to the  Notes  and  the
Indenture.  The Company has received tenders and consents from the holders of  a
majority  in aggregate principal amount of the Notes.  Accordingly, the  Company
and  the Trustee entered into a Third Supplemental Indenture dated December  13,
2006,  further  modifying and amending the terms of the  Indenture.   The  Third
Supplemental  Indenture  provides  that  it  will  become  effective  upon   the
Settlement  Date  (as defined in the Offer), provided that the validly  tendered
Notes  are  accepted for payment pursuant to the Offer.  When the terms  of  the
Third Supplemental Indenture become effective:

  (i)   substantially all of the restrictive covenants contained in the
        Indenture (and related references in the Notes) will be eliminated;

  (ii)  certain events of default with respect to the Notes will be eliminated;
        and

  (iii) certain other changes of a technical or conforming nature will be made
        to the Indenture and the Notes.

As  a result of these amendments, Holders of Notes will no longer be entitled to
the  benefits of such covenants and events of default, and the Company  will  be
permitted to take certain actions previously prohibited by the Indenture.

A copy of the Third Supplemental Indenture is attached as Exhibit 4.1 to this
Form 8-K.

Item 8.01 Other Events

On  December 12, 2006, United States Steel Corporation (the "Company") issued  a
press  release  announcing the pricing terms for the Offer.   The  Company  also
announced  that it has received tenders and consents from holders of a  majority
in  aggregate  principal amount of the Notes in connection with the solicitation
of consents to the proposed amendments to the Notes.

A copy of this press release is attached as Exhibit 99.1 to this Form 8-K.

Item 9.01  Financial Statements and Exhibits

     (d)  Exhibits

         4.1   Third   Supplemental  Indenture  dated  December  13,   2006   to
               Indenture  dated as of July 27, 2001, as previously  amended  and
               supplemented  by  the First Supplemental Indenture  dated  as  of
               November 26, 2001 and the Second Supplemental Indenture dated  as
               of May 20, 2003.

         99.1  Press  Release  -  "U.  S. Steel Announces Receipt  of  Requisite
               Consents  and  Pricing of Tender Offer for 10-3/4%  Senior  Notes
               due August 1, 2008."




SIGNATURE

     Pursuant  to the requirements of the Securities Exchange Act of  1934,  the
registrant  has  duly  caused this report to be signed  on  its  behalf  by  the
undersigned hereunto duly authorized.

UNITED STATES STEEL CORPORATION


By   /s/ Larry G. Schultz
     ---------------------------
     Larry G. Schultz
     Vice President & Controller



Dated:  December 13, 2006