ASTM B543 / B543M - 12

    Standard Specification for Welded Copper and Copper-Alloy Heat Exchanger Tube

    Active Standard ASTM B543 / B543M | Developed by Subcommittee: B05.04

    Book of Standards Volume: 02.01

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    ASTM B543 / B543M

    Significance and Use

    For purposes 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.

    PropertyRounded Unit for Observed or
    Calculated Value
    Chemical compositionnearest unit in the last righthand place
    of figures
    Tensile strength and yield strengthnearest ksi (Nearest 5 MPa)
    Grain size: Up to 0.055 mm, incl,
    Over 0.055 mm
    nearest multiple of 0.005 mm
    to the nearst 0.010 mm
    Expansion: Nearest 1 %

    1. Scope

    1.1 This specification established the requirements for welded tube of copper and various copper alloys up to 31/8in., inclusive, in diameter, for use in surface condensers, evaporators, heat exchangers, and general engineering applications. The following coppers or copper alloys are involved:

    Copper or
    Copper Alloy UNS No.2
    Previously Used
    Type of Metal
    C10800A...oxygen-free, low phosphorus
    C12200A... DHP phosphorized, high
    residual phosphorus
    C19400...copper-iron alloy brass
    C44300...arsenical admiralty
    C44400...antimonial admiralty
    C44500...phosphorized admiralty
    C68700...arsenical aluminum brass
    C70400...95-5 copper-nickel
    C70600...90-10 copper-nickel
    C70620...90-10 copper-nickel (Modified
    for Welding)
    C71000...80-20 copper-nickel
    C71500...70-30 copper-nickel
    C71520...7030 copper-nickel (Modified
    for Welding)

    A Copper UNS Nos. C10800 and C12200 are classified in Classification B224.

    1.2 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.

    1.3 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.

    WarningMercury has been designated by EPA and many state agencies as a hazardous material that can cause central nervous system, kidney, and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury-containing products. See the applicable product Material Safety Data Sheet (MSDS) for details and EPAs website ( for additional information. Users should be aware that selling mercury or mercury-containing products, or both, in your state may be prohibited by state law. (Mercury is a definite health hazard in use and disposal. (See 12.1.1.))

    ICS Code

    ICS Number Code 77.150.30 (Copper products)

    UNSPSC Code

    UNSPSC Code 40101802(Heat exchangers); 40181500(Welded copper tubes)

    DOI: 10.1520/B0543-07E01

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