Exhibit 32.2
CHIEF FINANCIAL OFFICER
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350
I, Gretchen R. Haggerty, Executive Vice President and Chief Financial Officer of United States Steel Corporation, certify that:
| (1) | The Quarterly Report on Form 10-Q of ÌÇÐÄlogo¹ÙÍøÊ×Ò³ for the period ending September 30, 2007, fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and |
| (2) | The information contained in the foregoing report fairly presents, in all material respects, the financial condition and results of operations of ÌÇÐÄlogo¹ÙÍøÊ×Ò³. |
/s/ Gretchen R. Haggerty
Gretchen R. Haggerty
Executive Vice President
and Chief Financial Officer
October 30, 2007
A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to ÌÇÐÄlogo¹ÙÍøÊ×Ò³ and will be retained by ÌÇÐÄlogo¹ÙÍøÊ×Ò³ and furnished to the Securities and Exchange Commission or its staff upon request.