ASTM B68M

This specification covers bright annealed seamless copper tube suitable for use in refrigeration,oil lines, gasoline lines, and so forth, where tube with an interior surface essentially free from scale and dirt is required. The material of manufacture shall be billets, cast bars, or tube of the copper UNS No. C10200, C10300, C10800, C12000, or C12200 and shall be of such soundness as to be suitable for processing into the tubular products described. The tube shall be manufactured by such hot- or cold-working process as to produce a homogeneous uniform wrought structure in the finished product. The material shall conform to the required chemical composition specified. The tube shall be furnished in either O50 or O60 annealed tempers. The tube shall have the minimum tensile strength and elongation values as specified when tested. The outside diameter of the tube furnished shall be capable of being expanded to the specified value when tested. The tube shall be capable of being flattened in accordance with the method described. Copper UNS nos. C10200, C12000, and C12200 shall be capable of passing the embrittlement test. Tubes that do not actuate the signaling device of the testing unit shall be considered as conforming to the requirements of the examination.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification establishes the requirements for bright annealed seamless copper tube suitable for use in refrigeration, oil lines, gasoline lines, and so forth, where tube with an interior surface essentially free from scale and dirt is required.

1.1.1 Tubes made from any of the following Copper UNS No. designations shall be supplied, unless otherwise specified in the contract or purchase order:

1.2 Values stated in SI units are the standard.

1.3 This specification is the companion to inch-pound Specification B 68.

The following hazard statement pertains only to the test method described in Sections and 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 and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

B153 Test Method for Expansion (Pin Test) of Copper and Copper-Alloy Pipe and Tubing
B251M Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube [Metric]
B577 Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper
B601 Classification for Temper Designations for Copper and Copper Alloys-Wrought and Cast
B68 Specification for Seamless Copper Tube, Bright Annealed
E112 Test Methods for Determining the Average Grain Size
E243 Practice for Electromagnetic (Eddy-Current) Examination of Copper and Copper-Alloy Tubes
E255 Practice for Sampling Copper and Copper Alloys for Determination of Chemical Composition
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E3 Practice for Preparation of Metallographic Specimens
E527 Practice for Numbering Metals and Alloys (UNS)
E53 Methods for Chemical Analysis of Copper
E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods)
E8M Test Methods for Tension Testing of Metallic Materials [Metric]

Index Terms

bright annealed; copper tube; seamless tube; ICS Number Code 77.150.30

Citing ASTM Standards

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