Form 8-K



Washington, D.C. 20549




Pursuant to Section 13 or 15(d) of

The Securities Exchange Act of 1934


Date of Report (Date of earliest event reported):

June 19, 2007

United States Steel Corporation

(Exact name of registrant as specified in its charter)


Delaware    1-16811    25-1897152

(State or other jurisdiction

of incorporation)



File Number)


(IRS Employer

Identification No.)


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

(Registrant’s telephone number, including area code)

(412) 433-1121


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))

Item 8.01. Other Events

Attached as Exhibit 100 to this report are documents that contain information from United States Steel Corporation’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2007, filed with the Securities and Exchange Commission on April 25, 2007, formatted in eXtensible Business Reporting Language (XBRL).

Users of this data are advised pursuant to Rule 401 of Regulation S-T that the information contained in the XBRL documents is unaudited and these are not the official publicly filed financial statements of United States Steel Corporation. The purpose of submitting these XBRL formatted documents is to test the related format and technology and, as a result, investors should continue to rely on the official version of the furnished documents and not rely on this information in making investment decisions.

In accordance with Rule 402 of Regulation S-T, the information in this Current Report on Form 8-K, including Exhibit 100, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and shall not be incorporated by reference into any filing or other document pursuant to the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits


EX-100.INS    XBRL Instance Document
EX-100.SCH    XBRL Taxonomy Extension Schema Document
EX-100.PRE    XBRL Taxonomy Extension Presentation Linkbase Document
EX-100.CAL    XBRL Taxonomy Extension Calculation Linkbase Document
EX-100.LAB    XBRL Taxonomy Extension Label Linkbase Document







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.


By   /s/ Larry G. Schultz

Larry G. Schultz

Vice President & Controller

Dated: June 19, 2007