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ASTM B359/B359M-25e1

Standard Specification for Copper and Copper-Alloy Seamless Condenser and Heat Exchanger Tubes With Integral Fins
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ASTM B359/B359M-25e1

Standard Specification for Copper and Copper-Alloy Seamless Condenser and Heat Exchanger Tubes With Integral Fins

PUBLISH DATE 2025
PAGES 11
ASTM B359/B359M-25e1

This specification establishes the requirements for seamless copper and copper alloy tubing on which the external or internal surface, or both, has been modified by a cold-forming process to produce an integral enhanced surface for improved heat transfer.

The tubes are typically used in surface condensers, evaporators, and heat exchangers.

The seamless copper and copper alloy tubing shall have the internal or external surface, or both, modified by a cold forming process to produce an integral enhanced surface for improved heat transfer. The tube, after enhancing, shall be supplied in the annealed (O61) or as-fabricated temper. The enhanced sections of tubes in the as-fabricated temper are in the cold-worked condition produced by the fabricating operation.

The unenhanced sections of tubes in the as-fabricated temper are in the temper of the tube prior to enhancing, annealed (O61), or light drawn (H55), and suitable for rolling-in operations.

Samples of annealed-temper (O61) tubes selected for test shall be subjected to microscopical examination and shall show uniform and complete recrystallization.

Grain size and mechanical properties such as tensile strength and yield strength of the alloys shall be determined.

Expansion and flattening tests shall be done to the alloys for performance evaluation.

Non-destructive tests such as:

  • eddy-current test,
  • hydrostatic test, and
  • pneumatic test

shall be done as well.

1.1 This specification2 covers the requirements for seamless copper and copper alloy tubing on which the external or internal surface, or both, has been modified by a cold-forming process to produce an integral enhanced surface for improved heat transfer.

1.2 The tubes are typically used in surface condensers, evaporators, and heat exchangers.

1.3 The product shall be produced of the following coppers or copper alloys, as specified in the ordering information.

Copper or
Copper Alloy
UNS No.

Type of Metal

   

C10100

Oxygen-Free Electronic

C10200

Oxygen-Free without Residual Deoxidants

C10300

Oxygen-Free, Extra Low Phosphorus

C10800

Oxygen-Free, Low Phosphorus

C12000

DLP Phosphorized, Low Residual Phosphorus
(See Note 1)

C12200

DHP, Phosphorized, High Residual Phosphorus
(See Note 1)

C14200

DPA Phosphorized Arsenical (See Note 1)

C15630

Nickel Phosphorus

C19200

Phosphorized, 1 % iron

C23000

Red Brass

C44300

Admiralty Metal Types B,

C44400

C, and

C44550

D

C60800

Aluminum Bronze

C68700

Aluminum Brass Type B

C70400

95-5 Copper-Nickel

C70600

90-10 Copper-Nickel

   
   

C70620

90-10 Copper-Nickel (Modified for Welding)

C71000

SDO ASTM: ASTM International
Document Number B359
Publication Date Oct. 1, 2025
Language en - English
Page Count 11
Revision Level 25e1
Supercedes
Committee B05.04
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