ASTM E696 - 07(2013)

    Standard Specification for Tungsten-Rhenium Alloy Thermocouple Wire

    Active Standard ASTM E696 | Developed by Subcommittee: E20.04

    Book of Standards Volume: 14.03


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    Abstract

    This specification covers the requirements for bare solid conductors made of tungsten and rhenium alloy thermoelements supplied in matched pairs. These thermoelements shall be suitable for use in either bead-insulated, bare-wire thermocouples, or in compacted metal-sheathed, ceramic insulated thermocouple material or assemblies. Unless otherwise noted, all information in this specification applies to both thermocouple combinations of tungsten-3 % rhenium versus tungsten-25 % rhenium (W3Re/W25Re) and tungsten-5 % rhenium versus tungsten-26 % rhenium (W5Re/W26Re; Type C). Thermoelements should meet specified physical, mechanical, thermoelectric, and compositional requirements.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E8 Test Methods for Tension Testing of Metallic Materials

    E207 Test Method for Thermal EMF Test of Single Thermoelement Materials by Comparison with a Reference Thermoelement of Similar EMF-Temperature Properties

    E220 Test Method for Calibration of Thermocouples By Comparison Techniques

    E230 Specification and Temperature-Electromotive Force (EMF) Tables for Standardized Thermocouples

    E344 Terminology Relating to Thermometry and Hydrometry

    E452 Test Method for Calibration of Refractory Metal Thermocouples Using a Radiation Thermometer

    E988 Temperature-Electromotive Force (EMF) Tables for Tungsten-Rhenium Thermocouples

    E1751 Guide for Temperature Electromotive Force (EMF) Tables for Non-Letter Designated Thermocouple Combinations


    ICS Code

    ICS Number Code 17.200.20 (Temperature-measuring instruments)

    UNSPSC Code

    UNSPSC Code 41112219(Thermocouple probes)


    Referencing This Standard

    DOI: 10.1520/E0696

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM E696-07(2013), Standard Specification for Tungsten-Rhenium Alloy Thermocouple Wire, ASTM International, West Conshohocken, PA, 2013, www.astm.org

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