ASTM B49-20 pdf free download.Standard Specification for Copper Rod for Electrical Purposes.
1.1 This specification covers the requirements for rod in diameters from ¼ in. to I 3/x in. (6.4 mm to 35 mm) produced from high conductivity coppers listed in Table 1, namely, electrolytic tough-pitch, oxygen-free. or fire-refined high conductivity coppers, and are suitable for further fabrication into electrical conductors.
1.2 The values stated in inch-pound units are to he regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and arc not considered standard.
11. Sampling
11. 1 Routine Sampling—For the routine analysis of copper rod coils, the methods of sampling shall be at the discretion of the tester.
11.2 This procedure shall be used in case of rod dispute between the manufacturer and the purchaser.
11.2.1 A lot shall be considered as a single coil of finished rod. A minimum of two samples of sufficient length shall be taken from the suspected non-conforming rod coil for retesting. Samples may be taken from either end of the rod coil at the discretion of the tester. Specific numbers and locations shall he determined between the producer and user. If the test pieces from both test samples pass the appropriate test(s), then the coil shall be deemed to conform to the particular requirement(s) of the standard. If a test piece fails a test, the rod coil represented in the shipping lot shall he deemed not to conform to this standard.
11.2.2 A shipping lot shall be the quantity of rod in coil form that is present in a single container, such as a truck or railroad car.
11.3 When a cast refinery shape has been chemically analyzed and converted into rod without remelting, further chemical analysis shall not be required.
12. Number of Test.s and Retests
12.1 Tests:
1 2. 1 . 1 chemical Analysis—Chemical composition shall be determined in accordance with the element mean of the results from at least two replicate analyses of the sample(s).
12.1.2 Other Tests:
1 2. 1 .2. 1 Electrical Resistiviti’, Tensile Elongation, t)iaineter, and Surface Oxide—Results shall he reported as the average obtained from at least two test specimens, each taken from a separate test piece where possible.
1 2. 1 .2.2 Hvdrogeiz Embriuleinent Test and Microscopical Examination—All specimens tested must meet the requirements of the specification.
12.2 Retests.
12.2.1 When requested by the manufacturer or supplier, a retest shall he permitted when results of tests obtained by the purchaser fail to conform to the requirements of the product specification.
12.2.2 The retest shall be as directed in the product specification for the initial test except the number of test specimens shall be twice that normally required for the specified test.
12.2.3 All test specimens shall conform to the product specification requirement(s) in retest. Failure to conform shall be cause for rejection.ASTM B49 pdf download.