EXHIBIT 32.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO TITLE 18, UNITED STATES CODE, SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 I, Michael D. Siegal, the Chairman & Chief Executive Officer of Olympic Steel, Inc. (the "Company"), certify that to the best of my knowledge, based upon a review of this annual report on Form 10-K: (1) The report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and (2) The information contained in the report fairly presents, in all material respects, the financial condition and results of operations of the Company. By: /s/ Michael D. Siegal --------------------- Michael D. Siegal Olympic Steel, Inc. Chairman & Chief Executive Officer March 26, 2004