U. S. Steel Conference Call Available on Company Web Site

United States Steel Corporation (NYSE: X) announced today that interested shareholders, investors and others may listen to the company's fourth quarter 2006 conference call with securities analysts on Tuesday, January 30, 2007, at 2 p.m. EST. The call, which will be available via the U. S. Steel web site, will cover fourth quarter 2006 financial results and may include forward-looking information.

U. S. Steel officials participating in the call will be John P. Surma, chairman and CEO; Gretchen R. Haggerty, executive vice president and CFO; and W. Nick Harper, manager-investor relations.

To access the webcast, visit the web site at www.ussteel.com and click on the "Investors" button. Replays of the conference call will be available on the web site after 5 p.m. on January 30.

Financial information, including earnings releases, certain SEC filings and other investor-related material, is also available at the company's web site.

For more information about U. S. Steel, visit www.ussteel.com.

First Call Analyst:
FCMN Contact:

SOURCE: United States Steel Corporation

CONTACT: John Armstrong, +1-412-433-6792, or Analysts-Investors, Nick
Harper, +1-412-433-1184, both of United States Steel Corporation

Web site: http://www.ussteel.com/

Company News On-Call: http://www.prnewswire.com/comp/929150.html