Expansion Alloy 29HK Kovar Uns K94610 Tube 5mmx1mm 6mmx1.5mm for Sealing Process

Model NO.
Kovar
Common Name
Kovar
Surface Treatment
Polish
Application
Glass Sealing
Transport Package
Woodencase
Specification
ID: 0.1~10.5 OD: 1.5~95mm
Trademark
OHMALLOY
Origin
China
HS Code
7507120000
Production Capacity
5000t/Year
Reference Price
$ 225.00 - 270.00
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Product Description

Expansion Alloy 29HK Kovar Uns K94610 Tube 5mmx1mm 6mmx1.5mm for sealing Process

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

 

Mechanical Properties

Grade

Tensile Strength N/mm²

Soft

1/4 Hard

1/2 Hard

3/4 Hard

Full Hard

Kovar Strip

<570

520-630

590-700

600-770

>700

Kovar Wire

<585

585-725

655-795

725-860

>860

 

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


Photo of Tube
Expansion Alloy 29HK Kovar Uns K94610 Tube 5mmx1mm 6mmx1.5mm for Sealing Process

Production Process
Expansion Alloy 29HK Kovar Uns K94610 Tube 5mmx1mm 6mmx1.5mm for Sealing Process
 

 

Testing Equirement
Expansion Alloy 29HK Kovar Uns K94610 Tube 5mmx1mm 6mmx1.5mm for Sealing Process
Shipment

 

 

Alloy