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This test method covers a determination of the sag properties of tungsten wire. The specimen of tungsten wire to be tested for sag shall have a clean, bright surface and should have the required length. With the aid of external heat, the test specimen shall be bent into a hairpin-shape until it reached the required distance between the ends. The formed test specimen shall be of sufficient length so that when clamped in the fixture, the exposed lengths measured from the top of the apex will be of required distance.
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.
1.1 This test method covers a determination of the sag properties of tungsten wire 0.030 in. (0.76 mm) and over in diameter.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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.
ICS Number Code 29.060.10 (Wires)
UNSPSC Code 26121500(Electrical wire)
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ASTM F269-60(2019), Standard Test Method for Sag of Tungsten Wire, ASTM International, West Conshohocken, PA, 2019, www.astm.orgBack to Top