Kovar Alloy is a nickel-iron-cobalt alloy with a coefficient of thermal expansion like that of hard glass. Since Kovar Alloy is tough and versatile, while employing extensive quality controls throughout UNS K94610 alloy’s manufacturing process to ensure uniform physical and mechanical properties for ease in deep drawing, stamping and machining are consistently achieved.
Kovar Applications
- Hermetic sealing
- Production of transistors and diodes in electronic industry
- Vacuum systems in chemistry and scientific research
- Electronic tubes (power, X-Ray)
- Hybrid circuit casings
- Oscillator housings
- Concentrated solar power
- Scientific instruments
Applications:
- Electronics and Telecommunications: Magnetic cores for transformers, inductors, and electronic components.
- Aerospace and Defense: Aircraft engine parts, magnetic shielding, and aerospace components.
- Energy Sector: Generators, turbines, and electrical power systems.
- Medical Equipment: Magnetic resonance imaging (MRI) machines and medical diagnostic devices.
- Automotive Industry: Sensors, actuators, and automotive electronic systems.
Chemical Composition(%)
GRADE | 4J29 | K94610 | 1.3981 |
C | ≤0.03 | ≤0.04 | ≤0.05 |
Si | ≤0.30 | ≤0.20 | ≤0.30 |
Mn | ≤0.50[TJC STEEL] | ≤0.50 | ≤0.50 |
P | ≤0.020 | — | — |
S | ≤0.020 | — | — |
Ni | 28.5~29.5 | 29.0* | 28.0~30.0 |
Co | 16.8~17.8 | 17.0* | 16.0~18.0 |
Cr | ≤0.20 | ≤0.20 | — |
Cu | ≤0.20 | ≤0.20 | — |
Mo | ≤0.20 | ≤0.20 | — |
Al | — | ≤0.10 | — |
Mg | — | ≤0.10 | — |
Zr | — | ≤0.10 | — |
Ti | — | ≤0.10 | — |
Fe | REST | Bal.* | Rest |
*：Is a typical value, can be adjusted according to the requirements of thermal expansion coefficient。
Kovar Typical Mechanical Properties
| Yield Strength,MPa | Tensile Strength,MPa | % Elongation in 2″ | Hardness Rockwell B |
|---|---|---|---|
| 345 | 517 | 30 | 68 |
Partial part type display:
