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Kovar alloy sheets and plates, also known by their UNS K94610 designation, are available in various sizes, widths, and thicknesses to meet diverse application needs. As widely stocked and exported materials, they are known for their precision engineering and consistency. These products undergo regular quality checks to ensure high performance and reliability across industries.
Kovar is a nickel-cobalt-iron alloy, specifically engineered for applications requiring tight mechanical joints between dissimilar materials at high temperatures. It is particularly suitable for glass-to-metal and ceramic-to-metal sealing. Its unique thermal expansion properties make it ideal for use in sensitive applications like semiconductors, aerospace, and microwave systems.
These sheets and plates are commonly used in chemical and pharmaceutical equipment, heat exchangers, condensers, and the pulp and paper industry. Due to their ability to withstand harsh conditions, they also serve well in seawater environments and other demanding operational settings.
Kovar plates are valued for features such as erosion resistance, thermal shock resistance, and oxidation resistance. They also demonstrate high corrosion resistance, strength, and impact durability. The material maintains excellent mechanical properties including yield and tensile strength, elongation, and thermal expansion that matches well with glass.
These sheets are engineered to provide thermal stability, including low thermal resistivity and high conductivity. Additional attributes include modulus of elasticity and Poisson’s ratio, which contribute to their stability under thermal stress. Their sealing capabilities ensure resistance to cracking and shock, making them ideal for high-precision and high-stress environments.
KOVAR Sheets & Plates
AMS, AMS, API
3mm-80mm
0.5 MM TO 200 MM THICK IN 1000 MM TO 2500 MM WIDTH & 2500 MM TO 12500 MM LENGTH
Hot-Rolled (HR) / Cold-Rolled (CR)
1.5mm to 1500mm
Perforated Sheet, Chequered Plates
Plates, Sheets, Plain Sheet, Shim Sheet
Kovar Sheet, Plates / UNS K94610
| STANDARD | Material No | UNS |
|---|---|---|
| Kovar | 1.3981 | K94610 |
| Weight % | Ni | Fe | Co | C | Mn | Si | Al | Cr | Mg | Zr | Ti | Cu | Mo |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alloy K Kovar | 29.0 | 53.0 | 17.0 | 0.04 max | 0.50 max | 0.20 | 0.10 max | 0.20 max | 0.10 max | 0.10 max | 0.10 max | 0.20 max | 0.20 max |
| Material | Condition | Yield Strength (0.1% Offset) | Tensile Strength | Elongation % |
|---|---|---|---|---|
| Alloy K Kovar | Annealed | 49,000 psi / 340 MPa | 75,000 psi / 520 MPa | 42 |
KOVAR Sheets are a nickel–cobalt ferrous alloy specifically engineered for applications requiring tight thermal expansion compatibility with glass and ceramics. These sheets are commonly used in electronic and aerospace components, where reliable hermetic seals are critical. With excellent dimensional stability and performance at varying temperatures, KOVAR ensures long-lasting and precise connections.
Sunrise Industries supplies high-quality KOVAR Plates in custom sizes and specifications to suit a range of technical applications. These plates offer excellent machinability, strength, and thermal properties, making them ideal for use in vacuum systems, microwave tubes, and semiconductor packages. Our commitment to quality and timely delivery makes us a reliable partner for advanced engineering solutions.
As your one-stop manufacturing partner, Sunrise Industries maintains a complete inventory of ready-to-sell raw materials alongside custom parts fabrication and full engineering services. From prototyping to production, we provide everything at a single location—serving all industrial sectors and transforming manufacturing value chains.
