ASTM WK65150

    Revision of A182 / A182M - 18 Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service

    (What is a Work Item?)

    Active Standard: A182 / A182M - 19

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



    WK65150


    Keywords

    austenitic stainless steel; chromium alloy steel; chromium-molybdenum steel; ferritic/austenitic stainless steel; ferritic stainless steel; martensitic stainless steel; nickel alloy steel; notch toughness requirements; pipe fittings; piping applications; pressure containing parts; stainless steel fittings; stainless steel forgings; steel; steel flanges; steel forgings, alloy; steel valves; temperature service applications, elevated; temperature service applications, high; wrought material ;;

    Rationale

    Swagelok Impaction Company and Wyman-Gordon, a Cleveland (Ohio) based forging company and supplier of Swagelok, have produced 276 lots of F53 (super duplex stainless steel, UNS S32750) forgings, mainly elbows and tees which were machined into tube fittings. Different sizes of forge rod from 24 different heats from two mill suppliers were used to make the forgings. The forgings were made with closed-die hot-forming processes which have been qualified to the requirements of the NORSOK M-650 supply chain qualification standard. The forgings were solution-annealed and water-quenched under optimal conditions. The average yield strength of the 276 forging lots was only 1.6 standard deviations above the minimum requirement of 80ksi per ASTM A182 for F53 forgings with a maximum section thickness 2 inch. In order to avoid producing forging lots which do not meet a minimum property requirement, the required minimum value should be 3 standard deviations below the measured average property value. Swagelok requests to change the ASTM A182 minimum requirements for yield strength from 80 to 76ksi and for tensile strength from 116 to 114ksi. An increase in minimum elongation from 15 to 25% is suggested.

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    Work Item Status

    Date Initiated:
    09-17-2018

    Technical Contact:
    Feroz Jokhio

    Item:
    046

    Ballot:
    A01 (19-05)

    Status:
    At Society Review