ASTM WK46297

    Revision of A182 / A182M - 14 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 - 14b

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



    WK46297

    1. Rationale

    Section 7.1 requires that all materials be cooled to a maximum temperature of 1000 F prior to the start of heat treatment. Section 7.3.1 does allow certain austenitic stainless grades to skip this step and proceed directly to heat treatment provided the part temperatures is above the minimum solution anneal temperature. Work done with ferritic-austenic (duplex and super duplex) materials has shown that they too can be effectively solution annealed without first cooling to a temperature below 1000 F. In practice these grades are generally processed in accordance with section 7.3.1 anyway to prevent the formation of sigma and other deleterious phases which would be present if they were air cooled after forging. Testing done on numerous forgings processed in this manner has shown that they do in fact meet the mechanical and corrosion resistance requirements of A182 when processed in this way. Current specification requirements force produces to conduct a seperate, unnecessary, solution anneal of these materials. This ballot item seeks to eliminate that requirement. Supporting data obtained from grades F51 and F61 is attached. Only those portions of the specification affected are included in the ballot.


    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 ;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    05-29-2014

    Technical Contact:
    Patrick Nowak

    Item:
    005

    Ballot:
    A01.22 (14-03)

    Status:
    Item Going To Next Ballot Level