STP1042

    The Effect of Residual Elements on the Tensile Strength of Heavy Carbon Steel Forgings, Heat Treated for Optimum Notch Toughness

    Published: Jan 1989


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    Abstract

    Residual elements are shown to have influenced the tensile strength of large, heavy section carbon steel forgings that had been heat treated for optimum Charpy V notch properties. The forgings had been made to a specification based on an early revision of ASTM Specification for Forgings, Carbon Steel, for Pressure Vessel Components (A 266-84a, UNS K035 06), but with several provisions of the more modern ASTM Specification for Quenched and Tempered Vacuum-Treated Carbon and Alloy Steel Forgings for Pressure Vessels (A 508-84a, UNS K13502). While not a factor in the particular contract described, the results are also discussed in terms of the use of carbon equivalency in the composition control of forgings for weldability purposes.

    Keywords:

    carbon steel forgings, inter-critical heat treatment, carbon equivalent, negative carbon segregation


    Author Information:

    Nisbett, EG
    Consultant, Warren, PA


    Paper ID: STP24575S

    Committee/Subcommittee: A01.11

    DOI: 10.1520/STP24575S


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