SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 _______ FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For November 15, 2002 Siderca S.A.I.C. Av. Leandro N. Alem 1067 Buenos Aires, Argentina (C1001AAF) Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F X________ Form 40-F_________ Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934. Yes_________ No X________ If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): Not applicable. This report on Form 6-K shall be incorporated by reference into the registration statement on Form F-4 (File No. 333-99769) of Tenaris S.A. 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, thereunto duly authorized. Siderca S.A.I.C. By: /s/ Horacio de las Carreras ------------------------------- Name: Horacio de las Carreras Title: Secretary to the Board Dated: November 15, 2002.