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ASTM B543/B543M-18

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

Previously Used
Designation

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

...

20.1 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
Calculated Value

 

 

Chemical composition

nearest unit in the last righthand place
 of figures

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 %

SDO ASTM: ASTM International
Document Number B543
Publication Date Oct. 1, 2018
Language en - English
Page Count 12
Revision Level 18
Supercedes
Committee B05.04
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