Standard Specification for
Silver-Tungsten Electrical Contact Materials1
This standard is issued under the fixed designation B 631; 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 631 – 93 (Reapproved 2004) Pdf free
Click here to download Astm B 630 – 88 (Reapproved 2001) Pdf Free Download