ASTM A 521 – 03 international standard

Standard Specification for Steel, Closed-Impression Die Forgings for General Industrial Use1

This popular is issued underneath the fixed designation a 521; the quantity right now following the designation shows the 12 months of original adoption or, in the case of revision, the 12 months of last revision. A variety of in parentheses shows the year of remaining reapproval. A superscript epsilon (e) shows an article change since the ultimate revision or reapproval.

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