Active Standard ASTM B543 / B543M | Developed by Subcommittee: B05.04
Book of Standards Volume: 02.01
Historical (view previous versions of standard)
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.
|Property||Rounded Unit for Observed or|
|Chemical composition||nearest unit in the last righthand place|
|Tensile strength and yield strength||nearest 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
|Type of Metal|
|C10800A||...||oxygen-free, low phosphorus|
|C12200A||...|| DHP phosphorized, high|
|C68700||...||arsenical aluminum brass|
|C70620||...||90-10 copper-nickel (Modified|
|C71520||...||70–30 copper-nickel (Modified|
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.
ICS Number Code 77.150.30 (Copper products)
UNSPSC Code 40101802(Heat exchangers); 40181500(Welded copper tubes)