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ASTM B447-12a(2021)


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ASTM B447-12a(2021) Standard Specification for Welded Copper Tube

standard by ASTM International, 01/01/2021

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1.1''This specification establishes the requirements for welded copper tube with a longitudinal seam free of filler metal produced from sheet or strip of the following coppers:

Copper UNS Nos.

Type of Copper



Oxygen-free electronic




Oxygen-free, extra low phosphorus


Oxygen-free, low phosphorus


Electrolytic tough pitch


Phosphorus deoxidized, low residual phosphorus


Phosphorus deoxidized, high residual phosphorus


Phosphorus deoxidized, arsenical

1.2''Unless otherwise specified in the contract or purchase order, product furnished of any listed copper, with the exception of copper C11000, shall be considered acceptable.

1.2.1''Copper C11000 welded tube shall not be used in applications where hydrogen embrittlement during heating is a concern.

1.3''Units'''The values stated in inch-pound units are to be regarded as standard except for grain size, which is given in SI units. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.4''The following hazard caveat pertains only to Section 13 of 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.

1.5''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.