ASTM A765/A765M-98a

    Standard Specification for Carbon Steel and Low-Alloy Steel Pressure-Vessel-Component Forgings with Mandatory Toughness Requirements

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    1. Scope

    1.1 This specification covers heat-treated carbon steel and alloy steel forgings with mandatory toughness requirements. These forgings are intended for pressure vessels, feedwater heaters, and similar uses.

    1.2 These forgings include tube sheets, covers, channel barrels, integral forged channels, rings, nozzles, flanges, and similar parts.

    1.3 All grades are considered weldable under proper conditions.

    1.4 The maximum thickness of forgings produced to this specification is limited only by the capacity of the selected grade to respond to any heat treatment specified and to meet the specified mechanical tests, including impact tests at the specified temperature.

    1.5 Material supplied to this specification shall conform to the requirements of Specification A 788, which outlines additional ordering information, manufacturing requirements, testing and retesting methods and procedures, marking, certification, product analysis variations, and additional supplementary requirements.

    1.6 If the requirements of this specification are in conflict with the requirements of Specification A 788, the requirements of this specification shall prevail.

    1.7 The values stated in either inch-pound units or SI [metric] units are to be regarded separately as the standard; within the text and tables, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

    1.8 Unless the order specifies the applicable "M" specification designation, the material shall be furnished to the inch-pound units.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    A275/A275M Practice for Magnetic Particle Examination of Steel Forgings

    A370 Test Methods and Definitions for Mechanical Testing of Steel Products

    A388/A388M Practice for Ultrasonic Examination of Steel Forgings

    A788/A788M Specification for Steel Forgings, General Requirements

    E112 Test Methods for Determining Average Grain Size

    E165 Practice for Liquid Penetrant Examination for General Industry

    ASME Standards

    ASMEBoilerandPressur


    ICS Code

    ICS Number Code 77.140.30 (Steels for pressure purposes)

    UNSPSC Code

    UNSPSC Code 31132100(Steel forgings)


    DOI: 10.1520/A0765_A0765M-98A

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