4J29 UNS K94610 nickel kovar alloy sheet

  Product Description Specifications 1. kovar alloy sheet 
2. Competitive price; 
3. Professional knowledge; 
4. Fast delivery; 
5. Good reputation; 4J29 UNS K94610 nickel kovar alloy sheet   Product Description   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.

Chemical Composition

Grade	C%	P%	S%	Mn%	Si%	Cu%	Cr%	Mo%	Ni%	Co%	Fe%
Kovar	Max 0.03	Max 0.020	Max 0.020	Max 0.50	Max 0.30	Max 0.20	Max 0.20	Max 0.20	28.5-29.5	16.8-17.8	Bal.

  Specifications

Grade	UNS	Werkstoff Nr.
Kovar	K94610	1.3981

  Physical Properties

Grade	Density	Melting Point
Kovar	8.17 g/cm3	1449°C

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