Luoyang Sifon Electronic Co., Ltd.
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  • Company Name : Luoyang Sifon Electronic Co., Ltd.
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Kovar alloy

Kovar alloy
Product Detailed
Related Categories:Nickel
Related Product Searches:Kovar alloy,High Quality,Kovar alloy, Kovar alloy
Kovar alloy is a vacuum melted, iron-nickel-cobalt, low expansion alloy available in sheet,plate,rod,bar,tube,pipe,wire,etc.

Kovar alloy

Type Analysis

Element

Min

Max

Carbon

--

0.02

Nickel

--

29.0

Iron

Balance

Silicon

--

0.20

Manganese

--

0.30

Cobalt

--

17.0

Description

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.

Applications

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 intergrated circuits, it has been used for the flat pack and the dual-in-line package.

Magnetic Properties

Kovar alloy is magnetic at all temperatures below the Curie point. Magnetic properties will depend upon heat treatment; the lower the hardness, the higher the permeability values and lower hysteresis loss. Examples of permeability properties are shown in the following chart:

Flux Density

Treatment

1830°F (999°C)30 min. - FCPermeability

2010°F (1099°C)20 min. - FCPermeability

5001000200050001000012000

100014002000230034003000

1900350058001000082005000

Kovar alloy

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