ASTM WK44452

    Revision of A335 / A335M - 11 Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

    (What is a Work Item?)

    Active Standard: A335 / A335M - 15a

    Developed by Subcommittee: A01.10 | Committee A01 | Contact Staff Manager


    1. Rationale

    A producer has questioned the basis for the coarse-grain melting practice requirement for P2 and P12 material in subsection 5.2. It is believed that this requirement has little to do with requiring a fine grain size in the finished product, but rather has been a means of preventing the use of aluminum for deoxidation, because of the long-held opinion that aluminum promoted graphitization in these alloys. Recent research indicates that aluminum is not a significant factor in promoting graphitization of these alloys. This action proposes to remove subsection 5.2 from the body of the specification and to add a supplementary requirement to limit use of aluminum for deoxidation of P2 and P12 pipe for those who may still want this restriction.


    alloy steel pipe; high temperature service; seamless steel pipe; steel pipe; temperature service applications: Alloy steel pipe--specifications; Ferritic steel pipe--specifications; High-temperature service applications--steel pipe; Hydrostatic testing; Seamless steel pipe--specifications;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    Michael Gold


    A01 (15-03)

    Ballot Item Approved as A335/A335M-2015A and Pending Publication