ASTM-A818:06(R2021) pdf free download – Standard Specification for Coppered Carbon Steel Wire.
8.2 The coppered wire as represented by the test specimens shall be capable of being wrapped in a close helix at a rate not exceeding 15 turns/mm around a cylindrical steel mandrel having a diameter equal to the diameter of the coated wire without cracking or flaking the copper coating to such an extent that any copper can be removed by rubbing with the bare fingers. Loosening or detachment during the adhesion test of superficial, small particles of copper formed by mechanical polishing of the surface of the coppered wire shall not be considered cause for rejection.
9. Workmanship
9.1 The coppered wire shall be free of slivers, scale, and other imperfections that would be detrimental to intended use. The copper coating shall be continuous and reasonably smooth. To ensure large continuous length coils, welds may he present in the finished wire.
10. Number of Tests and Retests
10. 1 A lot shall consist of all of the coils of wire of the same size, type and class, and shall he offered for inspection at one time. A wire sample of sufficient length, approximately 4 ft. (1.2 m), shall be cut from either end of each coil selected for tests described in Sections 6, 8 and 9.
10.2 The number of test specimens taken from the ends of coils during production to assure compliance with Sections 6 and 7 varies with the quality control procedures and the manufacturing facilities of each manufacturer, hut is generally not less than 10 % of the coils produced. For the purpose of final product testing, one specimen from every ten coils or fraction thereof in a lot shall be selected at random, or a total of seven specimens, whichever is less.
10.3 Should one or more of the wire specimens fail any requirement. the lot shall be subjected to retest. For retest purposes the original lot shall he regrouped into 50 coil lots or fractions thereof. Each lot shall be tested for the property in which the original sample failed to comply at a frequency of 10 % or more so that the total number of tests is at least double the original. Any lot that exhibits a failure shall be rejected. If during retesting an additional quality parameter is observed to be defective, the lot of 50 is subject to rejection for that cause. The manufacturer may test each coil in the failed lot for the property in which failure occurred and reject only the nonconforming coils.
11. Inspection
11.1 The manufacturer shall afford the inspector representing the purchaser all reasonable facilities to satisfy that the material is being furnished in accordance with this specification. All tests and inspections shall be made at the place of manufacture prior to shipment, unless otherwise specified, and shall be so conducted as not to interfere with the operation of the works.