ASTM A204/A204M-03

    Standard Specification for Pressure Vessel Plates, Alloy Steel, Molybdenum

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    1. Scope

    1.1 This specification covers molybdenum-alloy steel plates, intended particularly for welded boilers and other pressure vessels.

    1.2 Plates under this specification are available in three grades having different strength levels as follows:

    Grade Tensile Strength,ksi [MPa]
    A 65-85 [450-585]
    B 70-90 [485-620]
    C 75-95 [515-655]

    1.3 The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical property requirements; however, current practice normally limits the maximum thickness of plates furnished under this specification as follows:

    Grade Maximum Thickness,in. [mm]
    A 6 [150]
    B 6 [150]
    C 4 [100]

    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 this specification.

    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

    UNSPSC Code

    UNSPSC Code 30102204(Steel plate)

    Citation Format

    ASTM A204 / A204M-03, Standard Specification for Pressure Vessel Plates, Alloy Steel, Molybdenum, ASTM International, West Conshohocken, PA, 2003,

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