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Nizar Sheetsandplates is a trusted manufacturer and supplier located in Amman, Jordan, specializing in controlled-expansion alloys for precision engineering needs. They provide Kovar Sheets and Plates, a unique nickel–cobalt–iron alloy designed to match the thermal expansion properties of glass and ceramics. With a strong emphasis on metallurgical control and precise dimensional tolerances, Kovar products guarantee excellent sealing integrity and long-lasting stability. Nizar Sheetsandplates prioritizes quality assurance and adheres to international standards, making them a reliable choice for critical applications in electronics, aerospace, and instrumentation.
Kovar is a nickel–cobalt–iron alloy that typically consists of around 29% nickel, 17% cobalt, and the remainder being iron. This specific composition gives it a controlled coefficient of thermal expansion that closely aligns with borosilicate glass and alumina ceramics. Kovar sheets and plates provide moderate tensile and yield strength, good ductility, and outstanding dimensional stability. They also boast good machinability and weldability, ensuring reliable fabrication and hermetic sealing without the risk of cracking from thermal mismatches.
| 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 are commonly utilized in situations that require hermetic sealing between metal and glass or ceramic components. You’ll find them in electronic packages, semiconductor housings, vacuum tubes, and microwave components. They’re also used in aerospace and defense systems, sensors, and optical devices where managing thermal expansion is crucial. Thanks to their remarkable compatibility with glass-to-metal seals and their long-term dimensional stability, Kovar sheets and plates are the go-to choice for precision components that need to perform reliably under temperature fluctuations.
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