ASTM A645 / A645M - 10

    Standard Specification for Pressure Vessel Plates, Five Percent Nickel Alloy Steel, Specially Heat Treated

    Active Standard ASTM A645 / A645M | Developed by Subcommittee: A01.11

    Book of Standards Volume: 01.04


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    Abstract

    This specification covers specially heat treated 5% and 5 1/2% nickel alloy steel plates intended primarily for welded pressure vessels for service at low or cryogenic temperatures. Plates are classified as Grade A and Grade B. The steel shall be killed and shall conform to the fine austenitic grain size requirements specified. Plates shall be heat treated in accordance with the required specifications. The steel shall conform to the chemical requirements specified. Tensions tests and impacts tests shall be made to meet the mechanical requirements specified.

    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.

    Significance and Use

    1. Scope

    1.1 This specification covers specially heat treated 5 % and 5 ½ % nickel alloy steel plates intended primarily for welded pressure vessels for service at low or cryogenic temperatures.

    1.2 The maximum thickness of plates which can be supplied under this specification is limited only by the capacity of the material to meet the specified requirements.

    1.3 This material is susceptible to magnetization. Use of magnets in handling after heat treatment should be avoided if residual magnetism would be detrimental to subsequent fabrication or service.

    1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, 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.

    1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    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

    A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels

    A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates

    A577/A577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates

    A578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications


    ICS Code

    ICS Number Code 77.140.30 (Steels for pressure purposes); 77.140.50 (Flat steel products and semi-products)

    UNSPSC Code

    UNSPSC Code 30102204(Steel plateĀ )


    DOI: 10.1520/A0645_A0645M-10

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