1.1 本规范涵盖了直径为0.127的裸露固体导体、钨和铼合金热电元件的要求 毫米（0.005 英寸）至0.508 毫米（0.020 英寸）。这些热电偶元件应适用于珠绝缘裸线热电偶，或压实金属护套陶瓷绝缘热电偶材料或组件。 1.2 本规范涵盖钨-3热电偶组合 % 铼与钨-25 % 铼（W3Re/W25Re）和钨-5 % 铼与钨- 26 % 铼（W5Re/W26Re；C型）。除非另有说明，否则所有信息均适用于这两种组合。 1.3 人们认识到，所描述的合金是耐火的，不适合在氧化气氛中的高温下使用。本文所述的所有试验和工艺必须在对钨铼合金无反应的条件下进行。 1.4 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers the requirements for bare, solid conductor, tungsten and rhenium alloy thermoelements having diameters of 0.127 mm (0.005 in.) to 0.508 mm (0.020 in.) supplied in matched pairs. These thermoelements shall be suitable for use either in bead-insulated, bare-wire thermocouples, or in compacted metal-sheathed, ceramic insulated thermocouple material or assemblies. 1.2 This specification covers the thermocouple combinations of tungsten-3 % rhenium versus tungsten-25 % rhenium (W3Re/W25Re) and tungsten-5 % rhenium versus tungsten-26 % rhenium (W5Re/W26Re; Type C). All information applies to both combinations unless otherwise noted. 1.3 It is recognized that the alloys described are refractory and are not suitable for use at high temperatures in oxidizing atmospheres. All tests and processes described herein must be performed under conditions that are non-reactive to tungsten-rhenium alloys. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.