Section 906 of the Sarbanes-Oxley Act Certification


In connection with the Quarterly  Report of Amcast  Industrial  Corporation (the
"Issuer")  on Form 10-Q for the period  ending May 30,  2004,  as filed with the
Securities and Exchange Commission on the date hereof (the "Report"),  I, Joseph
R. Grewe, President and Chief Executive Officer of the Issuer, certify, pursuant
to 18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the  Sarbanes-Oxley Act
of 2002, that:

The Report fully complies with the requirements of section 13(a) or 15(d) of the
Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

The  information  contained  in the  Report  fairly  presents,  in all  material
respects, the financial condition and results of operations of the Issuer.



By /s/ Joseph R. Grewe
   ----------------------
     Joseph R. Grewe
     President and Chief Executive Officer
     June 30, 2004