ASTM B 359/B 359M:2025

1.1 This specification 2 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 80-20 Copper-Nickel Type A C71500 70-30 Copper-Nickel C71520 70-30 Copper-Nickel (Modified for Welding) C72200 Copper-Nickel Note 1: Designations listed in Classification B224 . 1.4 Units- The values stated in either in-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems could result in nonconformance with the specification. 1.5 Product produced in accordance with the Supplementary Requirements section for military applications shall be produced only to the inch-pound system of this specification. 1.6 The following safety hazard caveat pertains only to the test methods 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. Some specific hazards statements are given in Sections 1 , 12 and 18 . 1.7 ( 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.) 1.8 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.

23.040.15