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    ASTM B3-12

    Standard Specification for Soft or Annealed Copper Wire


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    1. Scope

    1.1 This specification covers drawn and annealed or soft round bare copper wire for electrical purposes (see Explanatory Note 1).

    1.2 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.

    1.2.1 Exception—For density, resistivity and temperature, the values stated in SI units are to be regarded as 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

    B49 Specification for Copper Rod Drawing Stock for Electrical Purposes

    B193 Test Method for Resistivity of Electrical Conductor Materials


    ICS Code

    ICS Number Code 77.150.30 (Copper products)

    UNSPSC Code

    UNSPSC Code 26121517(Copper wire)


    Referencing This Standard

    DOI: 10.1520/B0003-12

    ASTM International is a member of CrossRef.


    Citation Format

    ASTM B3-12, Standard Specification for Soft or Annealed Copper Wire, ASTM International, West Conshohocken, PA, 2012, www.astm.org

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