ASTM WK44366

    Work Item: ASTM WK44366 - Revision of A297 / A297M - 10 Standard Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application

    (What is a Work Item?)

    Active Standard: A297 / A297M - 10

    Developed by Subcommittee: A01.18 | Committee A01 | Contact Staff Manager



    1. Rationale

    HF, HH, and HK alloys in specification A297 are increasingly used for automotive exhaust component castings, as the automakers demanded higher engine temperatures. It is also desirable to reduce the raw material costs of Fe-Cr-Ni stainless steels for the automotive industry. In recent years, numerous R&DC (C- commercialization) work has been carried out for ferritic stainless steel, especially 18 to 22% Cr, for automotive applications. The chemistry is similar to CB30 in ASTM 743, but with intentionally added carbon for elevated-temperature strength and castability. This material is also similar to 1.4740 found in some of the European standards. The main objective of this work item is to add a 18 to 22% Cr stainless steel to A297, tentatively referred to as grade HB.


    Keywords

    Cast iron--specifications; Class codes (for metals/alloys); Iron-chromium castings--specifications; Steel castings--specifications;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    12-10-2013

    Technical Contact:
    Delin Li

    Status:
    Draft Under Development