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Standard Specification for Chromium-Iron Sealing Alloys with 18 or 28 Percent Chromium (Withdrawn 2023)
Translate name
STANDARD published on 1.5.2020
Designation standards: ASTM F256-05(2020)
Note: WITHDRAWN
Publication date standards: 1.5.2020
SKU: NS-993841
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
glass-to-metal sealing, iron-chromium alloys, UNS K91800, UNS K92801 ,, ICS Number Code 21.140 (Seals, glands)
1. Scope | ||||||||||||||||||
1.1 This specification covers two chromium-iron alloys, the former, (UNS K91800), nominally 18 % chromium, balance iron, the latter, (UNS K92801), nominally 28 % chromium, in strip, bar, wire, and rod forms intended primarily for sealing to glass in electronic applications. Note 1: UNS K92801 should only be considered for use at
service temperatures below 300°C. The alloy is prone to sigma phase
formation at temperatures close to 620°C, and exhibits brittle
mechanical behavior after prolonged exposures at temperatures close
to 475°C.
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 The following hazard caveat pertains only to the test method portion, Sections 16 and 17, of this specification. 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. |
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2. Referenced Documents | ||||||||||||||||||
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