EXHIBIT 32.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Allegheny Technologies Incorporated
(the "Company") on Form 10-Q for the period ended March 31, 2004 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), each
of the undersigned, in the capacities and on the dates indicated below, hereby
certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906
of the Sarbanes-Oxley Act of 2002, that to his knowledge:

1.       The Report 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 Report fairly presents, in all
         material respects, the financial condition and results of operations of
         the Company.

Date: April 28, 2004                  /s/ L. Patrick Hassey
                                      ------------------------------------------
                                      L. Patrick Hassey
                                      President and Chief Executive Officer

Date: April 28, 2004                  /s/ Richard J. Harshman
                                      ------------------------------------------
                                      Richard J. Harshman
                                      Executive Vice President-Finance
                                      and Chief Financial Officer

                                       45