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Nickel – Custom Machined Parts
Pure nickel shows excellent corrosion resistance to caustic soda and chlorine gas. Pure nickel also has a melting point of 1433°C, making it highly heat resistant.
Invar is an alloy consisting of 36% nickel and 64% iron. It has a nearly zero coefficient of thermal expansion at room temperature. Because of this characteristic, Invar is named after "Invariable steel". There is also Super Invar, which has a lower coefficient of thermal expansion than Invar.
Kovar is an alloy consisting of 29% nickel, 17% cobalt, and 54% iron. It has a low coefficient of thermal expansion among metals near room temperature. The coefficient of thermal expansion is close to hard glass, so it is mainly used for hard glass sealing. In addition to hard glass, it is also used as a bonding material for ceramic sealing, electronic tubes, and electronic components
Pure Nickel and Nickel Alloy - Properties
| Property (Unit) |
Purity (％) |
Bulk Density (g/㎤) |
Vickers Hardness (GPa) |
Young’s Modulus (GPa) |
Melting Point (℃) |
Coefficient of ThermalExpansion (10-⁶/℃) |
Thermal Conductivity (W/(m・K)) |
Volume Resistivity (Ω･㎝) |
|---|---|---|---|---|---|---|---|---|
| Materials | ||||||||
| Ni | 99.0 | 8.88 | 0.638 | 200 | 1433 | 12.9 (RT) |
72.7 | 9.2×10-⁶ |
| Invar | Ni 36% Fe64% |
8.12 | 168 | 140~150 | 1426 | 1.2~2.0 | 13 | 75~85×10-⁶ |
| Kovar | Ni 29% Fe54% Co17% |
8.0～8.3 | 1.5～1.6 | 159 | 1,450 | 5.2～6.2 (RT) |
17 (20℃) |
49×10-⁶ (20℃) |
Pure Nickel and Nickel Alloy - Key Properties & Popular Applications
| Key Properties | Applications | |
|---|---|---|
| Good Corrosion Resistance | Pure Ni has high corrosion resistance to alkali and nitrogen gas | ・Manufacturing Equipment for Caustic Soda |
| Magnetic | Pure Ni has very high permeability | ・Radio wave shield ・Transducer |
| Low thermal expansion | Invar has nearly zero thermal expansion coefficient at room temperature. |
・Clock pendulum ・Liquefied natural gas (LNG) tanks and pipes ・CRT shadow mask |
| Kovar has a thermal expansion coefficient similar to that of hard glass. |
・Sealing with glass ・Sealing with ceramics ・Optical communication components ・Vacuum tubes |
|
Available Sizes and Machining Capability
| Availability | Sizes（mm） | Machining Capability | Sizes（mm） |
|---|---|---|---|
| Plate | 500×800×30 | Hole diameter | Φ0.03～ |
| Rod | Φ100×500 | Hole depth | ～300 |
| Groove width | 0.1 or more | Max. hole number | ～10,000 |
| Max. Groove(pocket) depth | ～100 | Thread size | M1.2～ |
Pure Nickel and Nickel Alloy Custom Machined Parts
Top Seiko Co., Ltd.
〒526-0105
1197-4, Hosoe-cho, Nagahama City,
Shiga Pref.,526-0105 Japan
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