Standard Speciﬁcation for Nickel-Iron-Chromium-Silicon Alloy Bars and Shapes1
This standard is issued below the ﬁxed designation b 511; the number immediately following the designation shows the yr of original adoption or, inside the case of revision, the 12 months of final revision. More than a few in parentheses shows the 12 months of final reapproval. A superscript epsilon (e) indicates an editorial alternate because the ultimate revision or reapproval.
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You can also get ASTM B 508 – 86 International standard