Standard Speciﬁcation for Pressure Vessel Plates, Heat-Treated, Carbon-ManganeseSilicon Steel1

This popular is issued below the ﬁxed designation a 537/a 537m; the quantity without delay following the designation shows the year of authentic adoption or, in the case of revision, the year of closing revision. A variety of in parentheses indicates the yr of ultimate reapproval. A superscript epsilon (e) suggests a piece of writing exchange for the reason that closing revision or reapproval.
This preferred has been authorized to be used via organizations of the department of defense.