Model No.: Kovar
Place Of Origin: China
Packaging: Standard seaworthy package(wooden boxes package,pvc package, and other package).or as buyers requirement
Transportation: Ocean
Place of Origin: CHINA
Supply Ability: 10 Ton/Tons per Month
Port: SHANGHAI
Ni29Co18 Kovar Expanding alloy strip
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.
Ni29Co18 Kovar is a type of expanding alloy strip that is commonly used in the electronics industry for its ability to maintain a stable shape and size over a wide range of temperatures. It is composed of approximately 29% nickel, 18% cobalt, and the remainder iron, along with small amounts of other elements such as manganese, silicon, and carbon.
The unique properties of Ni29Co18 Kovar make it an ideal material for applications such as glass-to-metal seals in electronic components, microwave tubes, and vacuum tubes. It has a low coefficient of thermal expansion, meaning it expands and contracts very little with changes in temperature, which helps to prevent damage to delicate electronic components.
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 |
|
|
|
|
|
|
|
| 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 | |
Contact Now