ASTM A266/A266M-03a

    Historical Standard: ASTM A266/A266M-03a Standard Specification for Carbon Steel Forgings for Pressure Vessel Components

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    ASTM A266 / A266M

    1. Scope

    1.1 This specification covers four grades of carbon steel forgings for boilers, pressure vessels, and associated equipment.

    Note 1—Designations have been changed as follows:

    CurrentFormerly
    Grade 1Class 1
    Grade 2Class 2
    Grade 3Class 3
    Grade 4Class 4

    1.2 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.

    1.3 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.

    1.4 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

    A788/A788M Specification for Steel Forgings, General Requirements

    A1058 Test Methods for Mechanical Testing of Steel Products--Metric

    E112 Test Methods for Determining Average Grain Size

    E165/E165M Practice for Liquid Penetrant Examination for General Industry

    E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings

    Other Standard

    ASMEBoilerandPressur


    ICS Code

    ICS Number Code 77.140.30 (Steels for pressure purposes); 77.140.85 (Iron and steel forgings)

    UNSPSC Code

    UNSPSC Code 31132100(Steel forgings)


    DOI: 10.1520/A0266_A0266M-03A

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