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    ASTM A372 / A372M - 20e1

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

    Active Standard ASTM A372 / A372M | Developed by Subcommittee: A01.06

    Book of Standards Volume: 01.05

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    This specification deals with carbon and alloy steel forgings (including gas bottles) for use in thin-walled pressure vessels. Covered here are the following grades of steel forgings: Grade A; Grade B; Grade C; Grade D; Grade E, Classes 55, 65, and 70; Grade F, Classes 55, 65, and 70; Grade G, Classes 55, 65, and 70; Grade H, Classes 55, 65, and 70; Grade J, Classes 55, 65, and 70; Grade K; Grade L; Grade J, Class 110; and Grade M, Classes 85 and 100. Materials shall be manufactured by melting procedures, and optionally heat treated by normalization, normalization and tempering, or liquid-quenching and tempering. Heat and product analyses shall be performed wherein steel specimens shall conform to required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, and vanadium. Steel materials shall also undergo bending, flattening and hardness tests and shall conform to required values of tensile strength, yield strength, elongation, and hardness. Forgings shall be subjected to magnetic particle examination as well.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification2 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:



    Grade A

    Type I

    Grade B

    Type II

    Grade C

    Type III

    Grade D

    Type IV

    Grade E Class 55

    Type V Grade 1 Class 55

    Grade E Class 65

    Type V Grade 1 Class 65

    Grade E Class 70

    Type V Grade 1 Class 70

    Grade F Class 55

    Type V Grade 2 Class 55

    Grade F Class 65

    Type V Grade 2 Class 65

    Grade F Class 70

    Type V Grade 2 Class 70

    Grade G Class 55

    Type V Grade 3 Class 55

    Grade G Class 65

    Type V Grade 3 Class 65

    Grade G Class 70

    Type V Grade 3 Class 70

    Grade H Class 55

    Type V Grade 4 Class 55

    Grade H Class 65

    Type V Grade 4 Class 65

    Grade H Class 70

    Type V Grade 4 Class 70

    Grade J Class 55

    Type V Grade 5 Class 55

    Grade J Class 65

    Type V Grade 5 Class 65

    Grade J Class 70

    Type V Grade 5 Class 70

    Grade K

    Type VI

    Grade L

    Type VII

    Grade J Class 110

    Type VIII

    Grade M Class 85

    Type IX Class A

    Grade M Class 100

    Type IX Class B

    1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.

    1.3 Unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.

    1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

    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 Testing for General Industry

    E290 Test Methods for Bend Testing of Material for Ductility

    E433 Reference Photographs for Liquid Penetrant Inspection

    ASME Standard

    ASME Boiler and Pressure Vessel Code

    ICS Code

    ICS Number Code 77.140.85 (Iron and 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/A0372_A0372M-20E01

    Citation Format

    ASTM A372 / A372M-20e1, Standard Specification for Carbon and Alloy Steel Forgings for Thin-Walled Pressure Vessels, ASTM International, West Conshohocken, PA, 2020, www.astm.org

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