Kovar Nickel alloy steel

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 Nickel alloy similar material are:UNS K94610
Kovar Nickel alloy usually used in the following industries :
Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials.
Kovar Nickel alloy steel 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.

Kovar Nickel alloy steel
Kovar Nickel alloy steel chemical composition :

C Mn Co Ni Si
Max Max Max Max Max
0.02 0.30 17.0 29.0 0.20

Kovar Nickel alloy steel Mechanical Property:

Yield
Strength
Tensile
Strength
% Elongation
in 2″
Hardness
Rockwell B
ksi MPa ksi MPa
50 345 75 517 30 68

Forging
The principal precaution to observe in forging is to heat quickly and avoid soaking in the furnace. Long soaking may result in a checked surface due to absorption of sulfur from the furnace atmosphere and/or oxide penetration. A forging temperature of 2000/2150°F is preferred.
Typical Mechanical Properties
Typical Mechanical Properties of Strip
Tested parallel to the direction of rolling. Material annealed 1830°F for 30 minutes, then furnaced cooled.
Kovar Product form and Specifications:

Sheet/Plate/Bar AMS5894
International Werkstoff Nr.1.3981/DIN 17745/AFNOR NF A 54-301/S.E.W.385

 

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