Standard Practice for
Investment Castings, Surface Acceptance Standards, Visual
This standard is issued under the fixed designation A 997; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
Click below to download Astm A 997 – 98 (Reapproved 2003)pdf free
Click here to download Astm A 996/A 996M – 04 Pdf Free Download