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Kovar Sheets and Plates are specialized iron–nickel–cobalt alloy products designed for applications requiring precise thermal expansion control. Known for their ability to match the expansion characteristics of glass and ceramics, Kovar is widely trusted in high-precision and electronic industries. These sheets and plates offer excellent dimensional stability, good strength, and reliable performance across temperature variations. With consistent quality and predictable behavior, Kovar Sheets and Plates support critical sealing and structural requirements, making them an essential material for applications where accuracy, reliability, and long-term stability are paramount.
Kovar Sheets and Plates designed for applications requiring low elongation and high strength. It has a very broad thermal range comparable to that of glass, making it ideal for glass and metal coins. Mechanical properties include tensile strength of 600–750 MPa, yield strength of 240–450 MPa, and elongation of 20-40%. It has a high thermal stability and excellent resistance to oxidation and corrosion. Coatings are commonly used in electronics, aerospace, and precision mechanics where static expansion properties are important.
| Standard Specification : | UNS K94610 | Werkstoff Nr 1.3981 | DIN 17745 | ASTM F15 | AMS 7726 | AFNOR NF A54-301 | S.E.W 385 |
| Dimensions : | ASTM, ASME, and API |
| Sheets Thickness : | Range from .008″ to .0125″ |
| Plates Thickness : | Ranges from .0125″ to 5.00″ |
| Sheets/Plates Width : | 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc |
| Sheets/Plates Length : | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc |
| Tempers : | Annealed, 1/4, 1/2 Hard, 3/4 Hard, Full Hard |
| Hardness : | Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc. |
| Value Added Service : | Cladding, Heat Treatment, Annealed, Pickling, Polish, Rolling, Cutting, Bending, Forging, Minor Fabrication Etc. |
| Chemical Analysis | |
| Cr | 20 nom |
| Ni | 35 nom |
| Mo | 10 nom |
| Co | 35 nom |
| Material | Condition | Yield Strength (0.1% Offset) | Tensile Strength | Elongation % | ||
|---|---|---|---|---|---|---|
| psi | MPa | psi | MPa | |||
| Alloy K Kovar | Annealed | 49,000 | 340 | 75,000 | 520 | 42 |
| ASTM | UNS | Workstoff | AMS | DIN | AFNOR | S.E.W |
| F15 | K94610 | 1.3981 | 7726 | 17745 | NF A54-301 | 385 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Kovar Sheets and Plates provide excellent thermal expansion properties, making them ideal for applications requiring good compatibility with materials such as glass and ceramics Due to low coefficient of thermal expansion they maintain stability under temperature changes. Kovar also has good mechanical strength, corrosion resistance and strong weldability, making it suitable for harsh environments. Its magnetic properties are stable, making it useful in electronics and aerospace applications, especially for hermetic sealing of components. These features make Kovar ideal for high-performance precision applications.
Kovar Sheets and Plates made of nickel-cobalt alloys are widely used in applications requiring low thermal expansion and high strength These materials are commonly used in the electronics and semiconductor industries especially for packaging and hermetic sealing of electronic components. It is also used in the aerospace industry, where reliable performance over a range of temperatures is important. Additionally, Kovar is used in medical devices and vacuum seals, providing durability and durability under extreme conditions.
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