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ASTM F31-21

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Standard Specification for Nickel-Chromium-Iron Sealing Alloys (Withdrawn 2024)

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1.1 This specification covers two iron-nickel-chromium alloys (UNS K94760 and UNS K95150) used primarily for glass-sealing applications in electronic devices.

1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units 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.


This specification covers iron-nickel-chromium alloy (UNS K94760) used primarily for glass-sealing applications in electronic devices. The chemical composition of the material shall conform to the requirements prescribed. Chemical analysis shall be made, when desired, in accordance with the prescribed requirements. The average linear coefficient of thermal expansion shall be within limits of the requirements specified. The material shall be commercially smooth, uniform in cross section, in composition, and in temper; it shall be free of scale, corrosion, cracks, seams, scratches, slivers, and other defects.


SDO ASTM: ASTM International
Document Number F31
Publication Date Nov. 1, 2021
Language en - English
Page Count 4
Revision Level 21
Supercedes
Committee F01.03
Publish Date Document Id Type View
Nov. 1, 2021 F0031-21 Revision
May 1, 2016 F0031-16 Revision
July 1, 2012 F0031-12 Revision
Jan. 1, 2005 F0031-05 Revision
Oct. 1, 2010 F0031-05R10 Reaffirmation
June 10, 1999 F0031-94R99 Reaffirmation