ASTM B251/B251M Standard Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube

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ASTM B251/B251M Standard Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube
This specification covers a group of general requirements for wrought seamless copper and copper alloy tube. The material shall be produced by either hot or cold working operations, or both, and shall be finished, unless otherwise specified, by such cold working and annealing or heat treatment as necessary to meet the properties specified. Dimensional requirements such as wall thickness are specified. The sampling requirements including lot size, portion size, and selection of sample pieces are given. Requirements for chemical analysis, and tension, microscopical examination, Rockwell hardness, grain size, expansion (pin), mercurous nitrate, and electrical resistivity tests are detailed. The material shall conform to the prescribed chemical composition, hardness, electrical resistivity, tensile strength, yield strength, elongation, and grain size.
1. Scope
1.1 This specification covers a group of general requirements common to several wrought product specifications. Unless otherwise specified in the purchase order, or in an individual specification, these general requirements shall apply to copper and copper-alloy tube supplied under Specifications B68/B68M, B75/B75M, B135/B135M, B466/B466M, B643 and B743. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.3 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.
2. Referenced Documents
ASTM Standards B68/B68M Specification for Seamless Copper Tube, Bright Annealed B75/B75M Specification for Seamless Copper Tube B135/B135M Specification for Seamless Brass Tube B153 Test Method for Expansion (Pin Test) of Copper and Copper-Alloy Pipe and Tubing B154 Test Method for Mercurous Nitrate Test for Copper Alloys B170 Specification for Oxygen-Free Electrolytic CopperRefinery Shapes B193 Test Method for Resistivity of Electrical Conductor Materials B428 Test Method for Angle of Twist in Rectangular and Square Copper and Copper Alloy Tube B466/B466M Specification for Seamless Copper-Nickel Pipe and Tube B643 Specification for Copper-Beryllium Alloy Seamless Tube B743 Specification for Seamless Copper Tube in Coils B846 Terminology for Copper and Copper Alloys E3 Guide for Preparation of Metallographic Specimens E8/E8M Test Methods for Tension Testing of Metallic Materials E18 Test Methods for Rockwell Hardness of Metallic Materials E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications E53 Test Method for Determination of Copper in Unalloyed Copper by Gravimetry E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods) E112 Test Methods for Determining Average Grain Size E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition E478 Test Methods for Chemical Analysis of Copper Alloys
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