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    ASTM A957/A957M-09

    Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use


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    1. Scope

    1.1 This specification covers a group of requirements that are mandatory for castings produced by the investment casting process to meet the metallurgical requirements of the following steel casting specifications issued by ASTM.

    ASTM Designation
    Title of Specification
    A 27/A 27M Steel Castings, Carbon, for General Application
    A 148/A 148M Steel Castings, High-Strength, for Structural Purposes
    A 297/A 297M Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat-Resistant, for General Application
    A 447/A 447M Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service
    A 494/A 494M Castings, Nickel and Nickel Alloy
    A 560/A 560M Castings, Chromium-Nickel Alloy
    A 732/A 732M Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
    A 743/A 743M Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion-Resistant, for General Application
    A 744/A 744M Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service
    A 747/A 747M Steel Castings, Stainless, Precipitation Hardening
    A 890/A 890M Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application
    A 915/A 915M Steel Castings, Carbon and Alloy, Chemical Requirements Similar to Standard Wrought Grades

    1.2 This specification also covers a group of supplementary requirements that may be applied to the above specifications as indicated therein. These are provided for use when additional testing or inspection is desired and apply only when specified individually by the purchaser in the order.

    1.3 When investment castings are ordered, the requirements stated in this specification form an integral part of the material specification. In cases of conflict, the requirements of this specification shall take precedence over the individual material specification requirements.

    1.4 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.


    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

    A27/A27M Specification for Steel Castings, Carbon, for General Application

    A128/A128M Specification for Steel Castings, Austenitic Manganese

    A148/A148M Specification for Steel Castings, High Strength, for Structural Purposes

    A297/A297M Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application

    A370 Test Methods and Definitions for Mechanical Testing of Steel Products

    A380 Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems

    A447/A447M Specification for Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service

    A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel

    A494/A494M Specification for Castings, Nickel and Nickel Alloy

    A560/A560M Specification for Castings, Chromium-Nickel Alloy

    A609/A609M Practice for Castings, Carbon, Low-Alloy, and Martensitic Stainless Steel, Ultrasonic Examination Thereof

    A732/A732M Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures

    A743/A743M Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application

    A744/A744M Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service

    A747/A747M Specification for Steel Castings, Stainless, Precipitation Hardening


    ICS Code

    ICS Number Code 77.100 (Ferroalloys)

    UNSPSC Code

    UNSPSC Code 31101903(Steel investment casting)


    Referencing This Standard

    DOI: 10.1520/A0957_A0957M-09

    ASTM International is a member of CrossRef.


    Citation Format

    ASTM A957 / A957M-09, Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use, ASTM International, West Conshohocken, PA, 2009, www.astm.org

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