Kovar Rod/Kovar Bar/Kovar 4J29 Rod

Kovar Rod/Kovar Bar/Kovar 4J29 Rod

Kovar Alloy is Glass sealed and controlled expansion alloys  provided in a variety of forms to facilitate efficient manufacturing of various metal parts. It has thermal expansion characteristics matching those of hard glass. Used for matched expansion joints between metals and glass or ceramics.

Kovar alloy is a vacuum melted, iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. Extensive quality controls are employed in the manufacture of this alloy to ensure uniform physical and mechanical properties for ease in deep drawing, stamping and machining.

Kovar Alloy Trade Name: W.Nr.1.981;Nilo-k;UNS K94610(FeNi29Co17),Chinese 4J29

Kovar Bar Chemical composition:

Kovar Alloy Bar Physical Properties:

Kovar 4J29 Rod tensile strength of wire in line with the provisions 

Kovar Bar tensile strength in line with the provisions

Kovar 4J29 Rod average linear expansion coefficient in line     

Kovar Bar typical expansion coefficient    

Kovar Rod Specificaiton:

Kovar Alloy Bar Applications Fileds:                    

1.Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials.
2.This alloy has found wide application in power tubes, microwave tubes, transistors and diodes. In intergrated circuits, it has been used for the flat pack and the dual-in-line package.