1 Exhibit 23.1 Consent of Independent Auditors We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 33-38176) pertaining to Amcast Industrial Corporation 401(k) Salary Deferral Plan of our report dated February 12, 1999 with respect to the financial statements and schedules of Amcast Industrial Corporation 401(k) Salary Deferral Plan included in this Annual Report (Form 11-K) for the year ended August 31, 1998. /s/ ERNST & YOUNG LLP Dayton, Ohio February 12, 1999