Standard Test Method for
Microhardness and Case Depth of Powder Metallurgy (P/M)
Parts1

This standard is issued under the fixed designation B 721; 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 721 – 91 (Reapproved 1999) Pdf free

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