DUMET . NET
Everything You Wanted To Know About Dumet Wire

ACTIVE STANDARD: ASTM F29-97(2002)
Standard Specification for Dumet Wire for Glass-to-Metal Seal Applications

Developed by Subcommittee: F01.03
See Related Work by this Subcommittee
Adoptions: ANSI Approved
Book of Standards Volume: 10.04

1. Scope
1.1 This specification covers round, copper-coated 42% nickel-iron wire, commonly known as dumet, intended primarily for sealing to soft glass.
1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate.
2. Referenced Documents
B170 Specification for Oxygen-Free Electrolytic Copper-Refinery Shapes
D1535 Test Method for Specifying Color by the Munsell System
D1729 Practice for Visual Evaluation of Color Differences of Opaque Materials
E228 Test Methods for Linear Thermal Expansion of Solid Materials With a Vitreous Silicon Dilatometer
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E3 Methods of Preparation of Metallographic Specimens
E53 Methods for Chemical Analysis of Copper
F14 Practice for Making and Testing Reference Glass-Metal Bead-Seal

Index Terms

glass-to-metal sealing; iron-nickel/copper composite wire; vacuum electronics; ICS Number Code 31.240