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    ASTM A350/A350M-02a

    Standard Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components

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    1. Scope

    1.1 This specification covers several grades of carbon and low-alloy steel forged or ring-rolled flanges, forged fittings and valves intended primarily for low-temperature service and requiring notch toughness testing. They are made to specified dimensions, or to dimensional standards, such as the ASME and API Specifications referenced in Section 2. Although this specification covers some piping components machined from rolled bar and seamless tubular materials (see 5.3.3), it does not cover raw material produced in these product forms.

    1.2 No limitation on size is intended beyond the ability of the manufacturer to obtain the specified requirements. However, Class 3 of Grade LF787 is only available in the quenched-and-precipitation heat treated condition.

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

    1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable "M" specification designation (SI units), the material shall be furnished to inch-pound units.

    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 the specification.

    Note 1—Refer to Test Methods and Definitions A370 for notes on significance of notched-bar impact testing.

    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

    A788/A788M Specification for Steel Forgings, General Requirements

    A961/A961M Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications

    ASME Standards

    B 16.10 Face-to-Face and End-to-End Dimensions of Ferrous Valves

    B 16.11 Forged Steel Fittings, Socket-Welding and Threaded

    B 16.30 Unfired Pressure Vessel Flange Dimensions

    B 16.34 Valves-Flanged, Threaded, and Welding End

    B 16.47 Large Diameter Steel Flanges

    B 16.5 Steel Pipe Flanges and Flanged Fittings Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990,

    B 16.9 Factory-Made Wrought Steel Butt-Welding Fittings

    API Standards

    600 Steel Gate Valves with Flanged or Butt-Welding Ends

    602 Compact Design Carbon Steel Gate Valves for Refinery Use

    605 Large Diameter Carbon Steel Flanges

    ASME Boiler and Pressure Vessel Code

    Section IX

    AWS Standards

    A 5.1 Mild Steel Covered Arc-Welding Electrodes Available from American Welding Society (AWS), 550 NW LeJeune Rd., Miami, FL 33126,

    A 5.5 Low-Alloy Steel Covered Arc-Welding Electrodes

    ICS Code

    ICS Number Code 23.040.40 (Metal fittings)

    UNSPSC Code

    UNSPSC Code 31132100(Steel forgings)

    Referencing This Standard

    DOI: 10.1520/A0350_A0350M-02A

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM A350 / A350M-02a, Standard Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components, ASTM International, West Conshohocken, PA, 2002,

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