Standard Guide for
Specifying the Chemical Compositions for Electrical
Contact Materials (Arcing and Nonarcing)1
This standard is issued under the fixed designation B 772; 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 B 772 – 97 (Reapproved 2003) pdf free
Click here to download Astm B 771 – 87 (Reapproved 2001) Pdf Free Download