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This specification deals with the general requirements for carbon steel wire rods and uncoated coarse round wire in coils, or straightened and cut lengths. The steel shall be made by the electric-furnace, basic-oxygen, or other similar commercially accepted steel making process. The steel may be either ingot cast or strand cast. The chemical compositions for steel are specified by ranges or limits for carbon and other elements. Grain size shall be determined in accordance with the requirements of a reference material. The diameter, length and out-of-roundness of the coarse round wire and straightened and cut wire shall not vary from that specified by more than that prescribed. Mechanical tests for rods are commonly made on samples taken from the ends of coils after removing enough rings to clear any non-uniformity in the controlled cooling process. In the case of wire, tests are commonly made on samples taken from the ends of coils, thereby not impairing the usefulness of the whole coil.