ASTM WK68149

    Revision of A403 / A403M - 19 Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings

    (What is a Work Item?)

    Active Standard: A403 / A403M - 19

    Developed by Subcommittee: A01.22 | Committee A01 | Contact Staff Manager



    austenitic stainless steel; corrosive service applications; pipe fittings; steel; piping applications; pressure containing parts; stainless steel fittings ;;


    The Work Order request is to add a new alloy to the Specification. The alloy is referred to as Advanced 347AP with slightly higher mechanical properties and allowable stress values at high temperature. The alloy is backed by UOP for refinery and high temperature applications. The only difference in chemistry is added boron 0.001-0.005 and a slightly higher Nitrogen 0.06-0.12 (from 0.06-0.10) in 347AP.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    Dennis Rahoi

    Draft Under Development