This specification covers tungsten-rhenium alloy wire suitable for use in electron devices and lamps. The material is known as UNS R07031. This wire shall conform to the requirements as to chemical composition prescribed. The wire shall be furnished in the following finishes: Finish 1; Finish 2; Finish 3; Finish 4; and Finish 5. The following test methods shall be performed to conform with the specified requirements: chemical analysis; tensile strength; ductility; visual inspection; and dimensional measurements.

1.1 This specification covers tungsten-rhenium alloy wire suitable for use in electron devices and lamps.The material is known as UNS R07031.

1.2 The term wire as used in this specification applies to all material 0.020 in. (0.51 mm) or less in diameter that is spooled or coiled.

1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.