Min. Order:100 Kilogram
Transportation:Ocean,Land,Air
Port:shanghai
$10-20 /Kilogram
Model No.: Kovar NiCo2918
Brand: fenghua
Surface Treatment: smooth and bright
Application: power tubes, microwave tubes, transistors
Material: Ni-Co-Fe Alloy
Standard: ASTM/AISI/ASME/GB/DIN
Chemical Composition: 29% nickel, 17% cobalt, iron balance
Packaging: Standard seaworthy package(wooden boxes package,pvc package, and other package).or as buyers requirement
Transportation: Ocean,Land,Air
Place of Origin: jiangsu
Supply Ability: 10 Ton/Tons per Month Kovar NiCo2918
Certificate: iso9000
Port: shanghai
Kovar NiCo2918
The expansion characteristics of Kovar match both borosilicate (or Pyrex) glasses and alumina ceramics, making it one of the most popular of the controlled expansion alloys for hermetic sealing applications.
Kovar alloy is a iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials.
Kovar Specification
| ASTM | UNS | W.Nr |
| F15 | K94610 | 1.3981 |
Kovar Chemical composition
| Grade | % | Ni | Cr | Fe | Co | Cu | C | Mn | Si | P | S | Mo |
| Kovar | Min | 28.5 |
| Bal. | 16.8 |
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| Max | 29.5 | 0.2 | 17.8 | 0.20 | 0.03 | 0.50 | 0.30 | 0.02 | 0.02 | 0.20 |
Kovar Coefficient of linear expansion
| Grade | a/10-6·K-1 | ||
| Kovar | 200-300°C | 20-400°C | 20-450°C |
| / | 4.6-5.2 | 5.1-5.5 | |
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