Standard Speciﬁcation for Quenched-and-Tempered Carbon and High-Strength LowAlloy Structural Steel Plates1
This wellknown is issued under the ﬁxed designation a 678/a 678m; the wide variety straight away following the designation indicates the year of original adoption or, inside the case of revision, the yr of ultimate revision. A range of in parentheses indicates the year of final reapproval. A superscript epsilon (e) indicates an article trade since the final revision or reapproval.
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