ASTM A372/A372M-02

    Standard Specification for Carbon and Alloy Steel Forgings for Thin-Walled Pressure Vessels

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    1. Scope

    1.1 This specification covers relatively thin-walled forgings (including gas bottles) for pressure vessel use. Three types of carbon steel and six types of alloy steel are included. Provision is made for integrally forging the ends of vessel bodies made from seamless pipe or tubing.

    Note 1—When working to the chemical and tensile requirements of this specification, the influence of wall thickness and cooling rate will necessarily eliminate certain forging sizes in each class.

    Note 2—Designations have been changed as follows:

    CurrentFormerly
    Grade AType I
    Grade BType II
    Grade CType III
    Grade DType IV
    Grade E Class 55Type V Grade 1 Class 55
    Grade E Class 65Type V Grade 1 Class 65
    Grade E Class 70Type V Grade 1 Class 70
    Grade F Class 55Type V Grade 2 Class 55
    Grade F Class 65Type V Grade 2 Class 65
    Grade F Class 70Type V Grade 2 Class 70
    Grade G Class 55Type V Grade 3 Class 55
    Grade G Class 65Type V Grade 3 Class 65
    Grade G Class 70Type V Grade 3 Class 70
    Grade H Class 55Type V Grade 4 Class 55
    Grade H Class 65Type V Grade 4 Class 65
    Grade H Class 70Type V Grade 4 Class 70
    Grade J Class 55Type V Grade 5 Class 55
    Grade J Class 65Type V Grade 5 Class 65
    Grade J Class 70Type V Grade 5 Class 70
    Grade KType VI
    Grade LType VII
    Grade J Class 110Type VIII
    Grade M Class 85Type IX Class A
    Grade M Class 100Type IX Class B

    1.2 The values stated in either inch-pound or SI [metric] units are to be regarded separately as the standard. 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 independently of the other. Combining values from the two systems may result in nonconformance with the specification.

    1.3 Unless the order specifies the applicable "M" specification designation (SI units), the material shall be furnished to 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

    A530/A530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe

    A788/A788M Specification for Steel Forgings, General Requirements

    E112 Test Methods for Determining Average Grain Size

    E165/E165M Practice for Liquid Penetrant Examination for General Industry

    E290 Test Methods for Bend Testing of Material for Ductility

    E433 Reference Photographs for Liquid Penetrant Inspection

    Other Standard

    ASMEBoilerandPressur


    ICS Code

    ICS Number Code 77.140.85 (Iron and steel forgings)

    UNSPSC Code

    UNSPSC Code 31132100(Steel forgings)


    DOI: 10.1520/A0372_A0372M-02

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