ASTM-F256 › Historical Revision Information
Standard Specification for Chromium-Iron Sealing Alloys with 18 or 28 Percent Chromium
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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 1UNS K92801 should only be considered for use at service temperatures below 300C. The alloy is prone to sigma phase formation and associated brittle mechanical behavior after prolonged exposures at temperatures close to 475C.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
Keywords
glass-to-metal sealing; iron-chromium alloys; UNS K91800; UNS K; ICS Number Code 2801; 21.140 (Seals, glands)
To find similar documents by ASTM Volume:
10.04 (Electronics; Declarable Substances in Materials; 3D Imaging Systems)
To find similar documents by classification:
21.140 (Seals, glands Seals for pipe and hose assemblies, see 23.040.80)
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Document Number
ASTM-F256-05
Revision Level
2005 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
Jan. 1, 2005
Document Type
Specification
Page Count
8 pages
Committee Number
F01.03