Name: ASTM F 256 : 2005 : R2015
Brand: ASTM
Price: 62.61 GBP

ASTM F 256 : 2005 : R2015

Superseded

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

Available format(s)

Hardcopy , PDF

Superseded date

03-12-2023

Language(s)

English

Published date

01-07-2015

Publisher

American Society for Testing and Materials

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.

1.1This 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.

1.2The 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.

1.3The 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 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	7
ProductNote	Reconfirmed 2015
PublisherName	American Society for Testing and Materials
Status	Superseded
SupersededBy	ASTM F 256 : 2005 : R2020
Supersedes	ASTM F 256 : 2005 : R2010

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ASTM E 38 : 1985	Methods for Chemical Analysis of Nickel-Chromium and Nickel-Chromium-Iron Alloys (Withdrawn 1989)