Standard Speciﬁcation for Chromium-Vanadium Alloy Steel Spring Wire1
This preferred is issued beneath the ﬁxed designation a 231/a231m; the variety right now following the designation shows the 12 months of authentic adoption or, inside the case of revision, the 12 months of ultimate revision. quite a number in parentheses suggests the 12 months of closing reapproval. a superscript epsilon (e) suggests an article exchange for the reason that ultimate revision or reapproval.
This trendy has been permitted to be used via businesses of the department of protection.
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