Standard Historical Last Updated: Oct 29, 2018 Track Document
ASTM B543/B543M-12

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

Standard Specification for Welded Copper and Copper-Alloy Heat Exchanger Tube B0543_B0543M-12 ASTM|B0543_B0543M-12|en-US Standard Specification for Welded Copper and Copper-Alloy Heat Exchanger Tube Standard new BOS Vol. 02.01 Committee B05
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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 %


1.1 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.))

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Book of Standards Volume: 02.01
Developed by Subcommittee: B05.04
Pages: 12
DOI: 10.1520/B0543_B0543M-12
ICS Code: 77.150.30