ASTM A387 / A387M - 17a

    Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum

    Active Standard ASTM A387 / A387M | Developed by Subcommittee: A01.11

    Book of Standards Volume: 01.04


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    Abstract

    This specification covers chromium-molybdenum alloy steel plates for welded broilers and pressure vessels designed for elevated temperature service. Materials considered under this specification are available in grades 2, 12, 11, 22, 22L, 21, 21L, 5, 9 and 91. The steel materials shall be killed and shall be thermally treated. The steel specimens shall undergo heat analysis and product analysis and shall conform to the chemical requirements for carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, nickel, vanadium, columbium, boron, nitrogen, aluminum, titanium, and zirconium. The steel specimens shall also undergo tension tests and shall conform to the required values of tensile strength, yield strength, and elongation.

    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 chromium-molybdenum alloy steel plates intended primarily for welded boilers and pressure vessels designed for elevated temperature service.

    1.2 Plates are available under this specification in several grades having different alloy contents as follows:

    Nominal

    Nominal

    Chromium

    Molybdenum

    Grade

    Content, %

    Content, %

      2

    0.50

    0.50

     12

    1.00

    0.50

     11

    1.25

    0.50

     22

    2.25

    1.00

     21

    3.00

    1.00

      5

    5.00

    0.50

      9

    9.00

    1.00

     91

    9.00

    1.00

    1.3 Each grade except Grade 91 is available in two classes of tensile strength levels as defined in the Tensile Requirements tables. Grade 91 is available only as Class 2. Grade 91 consists of two types, with Type 2 differentiated from Type 1 by requiring restricted composition for the enhancement of creep resistance.

    Note 1: Grade 911, previously covered by this specification, is now covered by Specification A1017/A1017M.

    1.4 The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical property requirements.

    1.5 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 this specification.

    1.6 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

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

    A370 Test Methods and Definitions for Mechanical Testing of Steel Products

    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

    A1017/A1017M Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum-Tungsten


    ICS Code

    ICS Number Code 77.140.30 (Steels for pressure purposes)

    UNSPSC Code

    UNSPSC Code 30102204(Steel plate)


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/A0387_A0387M-17A

    Citation Format

    ASTM A387 / A387M-17a, Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum, ASTM International, West Conshohocken, PA, 2017, www.astm.org

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