ASTM B824 - 14

    Standard Specification for General Requirements for Copper Alloy Castings

    Active Standard ASTM B824 | Developed by Subcommittee: B05.05

    Book of Standards Volume: 02.01


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    Abstract

    This specification establishes the general requirements common to copper alloy castings of UNS Nos. C94700, C95300, C95400, C95410, C95500, C95520, and C96800. Materials shall be sampled and prepared, then tested accordingly to examine their conformance to mechanical (tensile and yield strength, hardness, and elongation), electrical (resistivity and conductivity), dimensional, chemical composition, and grain size requirements. In the event of conflict between this specification and the individual casting product specifications, the requirements of the casting specification shall take precedence.

    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

    14.1 For the purpose of determining compliance with the specified limits for requirements of the properties listed in the following table, an observed value or a calculated value shall be rounded as indicated in accordance with the rounding method of Practice E29.

    Property

    Rounded Limit for Observed or
    Calculated Value

     

    Chemical Composition
    Hardness
    Electrical Resistivity
    Electrical Conductivity

    nearest unit in the last right-hand significance digit used in expressing the limiting value

     

     

    Tensile Strength

    nearest ksi (5 MPa)

    Yield Strength

     

     

    Elongation

    nearest 1 %

     

     

    Grain Size:

     

     Under 0.060 mm

    nearest multiple of 0.005 mm

     0.060 mm and over

    nearest 0.01 mm


    1. Scope

    1.1 This specification establishes general requirements common to ASTM copper alloy casting specifications B22, B61, B62, B66, B67, B148, B176, B271/B271M, B369, B427, B505/B505M, B584, B763/B763M, B770, and B806. These requirements apply to the casting specifications to the extent referenced therein.

    1.1.1 In the event of conflict between this specification and a casting specification, the requirements of the casting specification shall take precedence.

    1.2 The chemical composition and other requirements not included in this specification shall be prescribed in the casting product specifications.

    1.3 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

    1.4 No precise quantitative relationship can be stated between the properties of the metal in various locations of the same casting or between the properties of castings and those of a test bar casting from the same metal. (See Appendix X1.)2


    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

    B22 Specification for Bronze Castings for Bridges and Turntables

    B61 Specification for Steam or Valve Bronze Castings

    B62 Specification for Composition Bronze or Ounce Metal Castings

    B66 Specification for Bronze Castings for Steam Locomotive Wearing Parts

    B67 Specification for Car and Tender Journal Bearings, Lined

    B148 Specification for Aluminum-Bronze Sand Castings

    B176 Specification for Copper-Alloy Die Castings

    B194 Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar

    B208 Practice for Preparing Tension Test Specimens for Copper Alloy Sand, Permanent Mold, Centrifugal, and Continuous Castings

    B271 Specification for Copper-Base Alloy Centrifugal Castings

    B369 Specification for Copper-Nickel Alloy Castings

    B427 Specification for Gear Bronze Alloy Castings

    B505/B505M Specification for Copper Alloy Continuous Castings

    B584 Specification for Copper Alloy Sand Castings for General Applications

    B763 Specification for Copper Alloy Sand Castings for Valve Applications

    B770 Specification for Copper-Beryllium Alloy Sand Castings for General Applications

    B806 Specification for Copper Alloy Permanent Mold Castings for General Applications

    B846 Terminology for Copper and Copper Alloys

    E8/E8M Test Methods for Tension Testing of Metallic Materials

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    E54 Test Methods for Chemical Analysis of Special Brasses and Bronzes

    E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods)

    E76 Test Methods for Chemical Analysis of Nickel-Copper Alloys

    E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition

    E478 Test Methods for Chemical Analysis of Copper Alloys

    E581 Test Methods for Chemical Analysis of Manganese-Copper Alloys


    UNSPSC Code

    UNSPSC Code 31100000(Castings and casting assemblies)


    DOI: 10.1520/B0824

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