View Historical Standards for A521:
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Document Designation and Title
Year
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Item(s)
A521/A521M Standard Specification for Steel, Closed-Impression Die Forgings for General Industrial Use
06
A521 Standard Specification for Steel, Closed-Impression Die Forgings for General Industrial Use
03
A521 Standard Specification for Steel, Closed-Impression Die Forgings for General Industrial Use
96(2001)
A521 Standard Specification for Steel, Closed-Impression Die Forgings for General Industrial Use
96
