Low Expansion Kovar / UNS K94610 ASTM F15 Nickel Alloy Strip for
making hermetic seals
1. Grade: Kovar
2. Process: VIR - VAR - ESR - Forging - Cold Rolling - Semifinished
3. Delivery Condition: Cold rolled
4. Surface Condition: 2B
5. Thickness: 0.1-6.35mm
6. Length*Width: Custom design
6. Specification: ASTM, ASME, GB, JIS, GOST, DIN, etc.
7. Packing: Plywood case, Bundle
Kovar alloy is a vacuum melted, iron-nickel-cobalt alloy that is widely
used in the electronics industry. Kovar is a nickel-iron-cobalt,
controlled-expansion alloy which contains 29% nickel. Its
coefficient of expansion, which decreases with rising temperature
to the inflection point, matches the expansion rate of borosilicate
glasses and alumina ceramics.
Kovar alloy has been used for making hermetic seals with the harder
Pyrex glasses and ceramic materials. This alloy has found wide
application in power tubes, microwave tubes, transistors, and
diodes. In integrated circuits, it has been used for the flat pack
and the dual-in-line package.
Kovar Chemical composition
Coefficient of Expansion
|Alloy||Linear Coefficient of Thermal Expansion a,10-6/°C|