ASTM A266 / A266M - 13

    Standard Specification for Carbon Steel Forgings for Pressure Vessel Components

    Active Standard ASTM A266 / A266M | Developed by Subcommittee: A01.06

    Book of Standards Volume: 01.05


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    Abstract

    This specification covers four grades of carbon steel forgings for boiler and pressure vessel components, and associated equipment. Materials shall be manufactured by melting process and hot-worked forging. Heat and product analyses shall be performed wherein forgings shall conform to chemical requirements for carbon, manganese, phosphorus, sulphur, and silicon. Mechanical properties such as tensile strength, yield strength, elongation, and reduction of area shall be inspected as well. The requirements for annealed, normalized, or normalized and tempered steel forgings, and that for quenched and tempered steel forgings have been specified separately.

    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 four grades of carbon steel forgings for boilers, pressure vessels, and associated equipment.

    Note 1Designations have been changed as follows:

    Current

    Formerly

    Grade 1

    Class 1

    Grade 2

    Class 2

    Grade 3

    Class 3

    Grade 4

    Class 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 SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

    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

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