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                                    FORM 6-K

                     U.S. SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                        REPORT OF FOREIGN PRIVATE ISSUER

                   PURSUANT TO RULE 13A-16 OR 15D-16 UNDER THE

                         SECURITIES EXCHANGE ACT OF 1934

                            dated September 10, 2003

                         Commission File Number 1-14878

                                   GERDAU S.A.

                    (Exact Name as Specified in its Charter)

                                       N/A

                       (Translation of Registrant's Name)

                                Av. Farrapos 1811
             Porto Alegre, Rio Grande do Sul - Brazil CEP 90220-005
                    (Address of principal executive offices)


         Indicate by check mark whether the registrant files or will file annual
reports under cover Form 20-F or Form 40-F.

         Form 20-F    X    Form 40-F

         Indicate by check mark if the registrant is submitting the Form 6-K in
paper as permitted by Regulation S-T Rule 101(b)(1): ____

         Indicate by check mark if the registrant is submitting the Form 6-K in
paper as permitted by Regulation S-T Rule 101(b)(7): ____

         Indicate by check mark whether by furnishing the information contained
in this Form, the registrant 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.

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                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused the Report to be signed on its behalf by the
undersigned, thereunto duly authorized.

Date:  September 10, 2003

                              GERDAU S.A.


                              By:/S/ OSVALDO  BURGOS SCHIRMER
                                 Name:   Osvaldo Burgos Schirmer
                                 Title:  Chief Financial Officer





                                  EXHIBIT INDEX

EXHIBIT             DESCRIPTION OF EXHIBIT

1                   Press release dated September 8, 2003

2                   Press release dated September 9, 2003