| Model NO. | Kovar |
| Application | Glass Sealing |
| Common Name | Kovar |
| State | Annealing |
| ASTM | F30 |
| Uns | K94610 |
| Carbon Content | Low Carbon |
| Product Type | Tube |
| Transport Package | Woodencase |
| Specification | ID: 0.1~10.5 OD: 1.5~95mm |
| Trademark | OHMALLOY |
| Origin | China |
| HS Code | 7507120000 |
| Production Capacity | 5000t/Year |
Kovar (Ni29Co18) by ASTM F30 Expandable Alloy Seamless Pipe 2*0.6 2*0.3mm hot sale
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
Production Process
Testing Equirement
Shipment
