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Shanghai Tankii Alloy Material Co.,Ltd
Shanghai Tankii Alloy Material Co.,Ltd
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1.5x0.2mm ASTM F15 Kovar Alloy Tube for Glass to Metal Seals in Electronics

Product Details

Place of Origin: Shanghai, China

Brand Name: TANKII

Certification: ISO9001

Model Number: Kovar

Payment & Shipping Terms

Minimum Order Quantity: 5 KG

Price: negotiable

Packaging Details: Carton + Wooned Case

Delivery Time: 7-20 days

Payment Terms: L/C, T/T, Western Union

Supply Ability: 10 Tons per month

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Specifications
Highlight:

1.5x0.2mm Nickel Kovar pipe

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Invar Alloy 4j29 tube

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ASTM F15 Nickel Iron Alloy

Description
1.5x0.2mm ASTM F15 Kovar Alloy Tube for Glass to Metal Seals in Electronics

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

Coefficient of Expansion

Alloy Linear Coefficient of Thermal Expansion a,10-6/°C
20-200°C 20-300°C 20-400°C 20-450°C 20-500°C 20-600°C 20-700°C 20-800°C
Kovar 5.9 5.3 5.1 5.3 6.2 7.8 9.2 10.2

 

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