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ASTM F 256 :2005

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Specification for Chromium-Iron Sealing Alloys with 18 or 28 Percent Chromium
Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Language(s)

English

Published date

01-01-2005

CONTAINED IN VOL. 10.04, 2015 Defines 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.

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 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.

The following hazard caveat pertains only to the test method portion, Sections and , 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 and health practices and determine the applicability of regulatory limitations prior to use.

Committee
F 01
DevelopmentNote
Supersedes ASTM F 257. (03/2002)
DocumentType
Standard
Pages
8
ProductNote
Reconfirmed 2005
PublisherName
American Society for Testing and Materials
Status
Superseded

ASTM E 228 : 2017 : REDLINE Standard Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer
ASTM F 140 : 1998 Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods
ASTM E 38 : 1985 Methods for Chemical Analysis of Nickel-Chromium and Nickel-Chromium-Iron Alloys (Withdrawn 1989)

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