ASTM B0543_B0543M-26
Standard Specification for Welded Copper and Copper-Alloy Heat Exchanger Tube
| Standard number: | ASTM B0543_B0543M-26 |
| Released: | 01.10.2026 |
| Status: | Active |
| Pages: | 12 |
| Section: | 02.01 |
| Keywords: | condenser; copper; copper alloy; copper nickel; evaporator; heat exchanger; welded tube; UNS No. C10800; UNS No. C12200; UNS No. C19400; UNS No. C23000; UNS No. C44300; UNS No. C44400; UNS No. C44500; UNS No. C68700; UNS No. C70400; UNS No. C70600; UNS No. C70620; UNS No. C71000; UNS No. C71500; UNS No. C71520; UNS No. C71640; UNS No. C72200; |
| ASTM number: | ASTM B543/B543M |
| Supersedes: | B0543_B0543M-18 |
This specification covers welded tube of specific copper and various copper alloys of a limited range of diameters, for use in surface condensers, evaporators, heat exchangers, and general engineering applications. The product shall be manufactured by forming the material into a tubular shape on a suitable forming mill. Welding of tube shall be accomplished by forge-welding, fusion-welding, or full finishing that produces a forge weld leaving no crevice in the weld seam visible to the unaided eye. The tube shall conform to tensile strength and yield strength requirements, and shall be subject to expansion, flattening, and reverse bend tests. Mercurous nitrate or ammonia vapor tests shall be required only for selected UNS Numbers of Copper Alloys. Each tube shall be subjected to eddy-current, hydrostatic, and pneumatic tests.
1.1 This specification covers the requirements for welded tube of copper and various copper alloys up to 31/8 in., 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 residual phosphorus |
C19400 | copper-iron alloy |
C23000 | red 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 | 70-30 copper-nickel (modified for welding) |
C71640 | copper-nickel-iron-manganese |
C72200 | ... |
1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, SI units are shown in brackets. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
1.3 The following safety hazard caveat pertains only to the test method(s) described in 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Warning—Mercury has been designated by many regulatory agencies as a hazardous substance that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Use caution when handling mercury and mercury-containing products. See the applicable product Safety Data Sheet (SDS) for additional information. The potential exists that selling mercury or mercury-containing products, or both, is prohibited by local or national law. Users must determine legality of sales in their location.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.