ASTM International - ASTM F256-05(2020)

Standard Specification for Chromium-Iron Sealing Alloys with 18 or 28 Percent Chromium

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Organization: ASTM International
Publication Date: 1 May 2020
Status: active
Page Count: 7
ICS Code (Seals, glands): 21.140
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.

abstract:

This specification covers two chromium-iron alloys, one is UNS K91800 with nominally 18% chromium, balance iron, and the other is UNS K92801 with nominally 28% chromium, both in strip, bar, wire,... View More

Document History

ASTM F256-05(2020)
May 1, 2020
Standard Specification for Chromium-Iron Sealing Alloys with 18 or 28 Percent Chromium
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...
July 1, 2015
Standard Specification for Chromium-Iron Sealing Alloys with 18 or 28 Percent Chromium
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...
October 1, 2010
Standard Specification for Chromium-Iron Sealing Alloys with 18 or 28 Percent Chromium
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...
January 1, 2005
Standard Specification for Chromium-Iron Sealing Alloys with 18 or 28 Percent Chromium
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...
January 1, 2005
Standard Specification for Chromium-Iron Sealing Alloys with 18 or 28 Percent Chromium
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...
June 10, 1999
Standard Specification for Chromium-Iron Sealing Alloys with 18 or 26 Percent Chromium
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...
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