Min. Order:50 Kilogram
Transportation:Ocean,Land,Air
Port:SHANGHAI
$50≥200Kilogram
Brand: FENGHUA
Place Of Origin: China
Brand Name: Xinhua Alloy
Material: Iron Nickel Cobalt Alloy
Packaging: plastic film inside, wooden pallets outside , choose the suitable packing
Productivity: 20 Metric Ton/Metric Tons per
Transportation: Ocean,Land,Air
Place of Origin: JIANGSU
Supply Ability: 20 Metric Ton/Metric Tons per Month
Certificate: ISO9000
Port: SHANGHAI
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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