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.