Standard Specification for
80 % Silver-20 % Graphite Sliding Contact Material1
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This standard is issued under the fixed designation B 664; 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 664 – 90 (Reapproved 2000) Pdf free

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Click here to download Astm B 663 – 94 (Reapproved 2000) Pdf Free Download