ASTM F30

This specification covers the characteristics and requirements for iron-nickel alloys intended primarily for sealing to glass in electronic applications. The alloys shall conform to chemical composition, surface finish, temper, grain size, and thermal expansion requirements as stated herein.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification covers iron-nickel alloys that are intended primarily for sealing to glass in electronic applications.

Note 1—Some of these alloys may be used for sealing to ceramics, but this specification in its present form is not intended to cover material for metal-to-ceramic seals.

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 This standard does not purport to address 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. The hazard statement pertains only to the test method sections, Sections 10 and 12.

2. Referenced Documents

ASTM Standards
E112 Test Methods for Determining Average Grain Size
E18 Test Methods for Rockwell Hardness of Metallic Materials
E228 Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
F14 Practice for Making and Testing Reference Glass-Metal Bead-Seal
F140 Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods
F144 Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods

Index Terms

glass-to-metal sealing applications; iron-nickel alloys; UNS K94600; UNS K94800; UNS N14052; vacuum electronics; Electronic materials/applications--specifications; Electron tubes--sealing to glass; Glass electronic seals; Iron-nickel alloy--specifications; Metal electronic components/devices--specifications; Porosity--seals (in electronic applications); Seals--electronic applications (specifications); UNS N04404 (nickel-copper alloys); UNS N14052 (nickel-iron alloy) ; ICS Number Code 77.120.40 (Nickel, chromium and their alloys)

Citing ASTM Standards

[Back to Top]