ASTM B 521 – 98 International standard

Standard Specification for Tantalum and Tantalum Alloy Seamless and Welded Tubes1

This popular is issued under the fixed designation b 521; the number at once following the designation indicates the 12 months of authentic adoption or, in the case of revision, the 12 months of last revision. Quite a number in parentheses indicates the yr of ultimate reapproval. A superscript epsilon (e) shows an editorial exchange because the remaining revision or reapproval.

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