ASTM A508/A508M-03

    Standard Specification for Quenched and Tempered Vacuum-Treated Carbon and Alloy Steel Forgings for Pressure Vessels

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    1. Scope

    1.1 This specification covers quenched and tempered vacuum treated carbon and alloy steel forgings for pressure vessels such as those used in reactor systems. Specifically, it covers forgings for vessel closures, shells, flanges, tube sheets, rings, heads, and similar parts.

    1.2 All grades are considered weldable under proper conditions. Welding technique is of fundamental importance, and it is presupposed that welding procedure and inspection will be in accordance with approved methods for the grade of material used.

    1.3 The values stated in either inch-pound units or SI (metric) units are to be regarded separately as standards. Within the text and the tables, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other. Combining values from the two systems may result in nonconformance with the specification.

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

    Note 1—Grades 1 and 1A are composed of different chemistries but have the same mechanical requirements.

    Note 2—Designations have been changed as follows:

    Grade 1Class 1
    Grade 1AClass 1A
    Grade 2 Class 1Class 2
    Grade 2 Class 2Class 2A
    Grade 3 Class 1Class 3
    Grade 3 Class 2Class 3A
    Grade 4N Class 1Class 4
    Grade 4N Class 2Class 4A
    Grade 4N Class 3Class 4B
    Grade 5 Class 1Class 5
    Grade 5 Class 2Class 5A
    Grade 22 Class 3Class 22B
    Grade 3VClass 3V
    Grade 6 Classes 1, 2, 3, and 4N/A

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

    American Society of Mechanical Engineers Standard

    Boiler and Pressure Vessel Code—Section III NC 2300, ND 2300, NE 2300, NF 2300, NG 2300 Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990,

    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

    A966/A966M Practice for Magnetic Particle Examination of Steel Forgings Using Alternating Current

    E208 Test Method for Conducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic Steels

    E428 Practice for Fabrication and Control of Metal, Other than Aluminum, Reference Blocks Used in Ultrasonic Testing

    ICS Code

    ICS Number Code 77.140.30 (Steels for pressure purposes)

    UNSPSC Code

    UNSPSC Code 31132100(Steel forgings)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/A0508_A0508M-03

    Citation Format

    ASTM A508 / A508M-03, Standard Specification for Quenched and Tempered Vacuum-Treated Carbon and Alloy Steel Forgings for Pressure Vessels, ASTM International, West Conshohocken, PA, 2003,

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