Standard Specification for
Steel Castings, Alloy, Specially Heat-Treated, for Pressure-
Containing Parts, Suitable for High-Temperature Service1
This wellknown is issued underneath the constant designation a 389/a 389m; the range at once following the designation suggests the year
of unique adoption or, inside the case of revision, the 12 months of closing revision. more than a few in parentheses shows the yr of remaining reapproval.
a superscript epsilon (e) indicates an article change since the remaining revision or reapproval.
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