ASTM B870-02

    Standard Specification for Copper-Beryllium Alloy Forgings and Extrusions Alloys (UNS Nos. C17500 and C17510)

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    1. Scope

    1.1 This specification establishes the requirements for copper-beryllium alloy forgings and extrusions. The following alloys are specified:

    Copper Alloy UNS No.Nominal Composition, %
    BerylliumCobaltNickel
    C175000.592.6
    C175100.401.8

    1.2 Units—The values stated in inch-pound units are standard. The values given in parentheses are mathematical conversions to SI units, which are provided for information only and are not considered standard.

    1.3 The following safety hazard caveat pertains to Sections 10 and 11 of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    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

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

    B249/B249M Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings

    B441 Specification for Copper-Cobalt-Beryllium, Copper-Nickel-Beryllium, and Copper-Nickel-Lead-Beryllium Rod and Bar (UNS Nos. C17500, C17510, and C17465)

    B601 Classification for Temper Designations for Copper and Copper Alloys--Wrought and Cast

    B846 Terminology for Copper and Copper Alloys

    B950 Guide for Editorial Procedures and Form of Product Specifications for Copper and Copper Alloys

    E8/E8M Test Methods for Tension Testing of Metallic Materials

    E18 Test Methods for Rockwell Hardness of Metallic Materials

    E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

    E1004 Test Method for Determining Electrical Conductivity Using the Electromagnetic (Eddy-Current) Method


    ICS Code

    ICS Number Code 77.120.30 (Copper and copper alloys)

    UNSPSC Code

    UNSPSC Code 31133100(Copper forgings); 31111605(Copper impact extrusions)


    DOI: 10.1520/B0870-02

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