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Wiraphan Sheets and Plates, a top-notch manufacturer and supplier located in Bangkok, Thailand, specializes in high-quality Kovar Foils designed for precision electronic and industrial applications. These foils are crafted with a keen eye for international standards, ensuring they offer outstanding thermal expansion compatibility, mechanical strength, and resistance to corrosion. Kovar Foils from Wiraphan are a go-to choice in industries that demand precise dimensional stability and dependable performance, especially in electronic and hermetic sealing applications. With a commitment to timely delivery, competitive pricing, and exceptional customer support, the company guarantees a steady supply for both local and international clients.
Kovar Foils are mainly made from a nickel-cobalt-iron alloy, typically featuring around 29% nickel, 17% cobalt, and 53% iron. This distinctive blend gives Kovar Foils a thermal expansion coefficient that closely aligns with that of borosilicate glass and ceramics, all while maintaining impressive tensile strength, ductility, and machinability. On the mechanical side, these foils are easy to form, weld, and fabricate, making them perfect for hermetic sealing and precision electronic components.
| 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.
You’ll find Kovar Foils widely used across electronics, aerospace, medical devices, and precision instrumentation sectors. They excel in creating hermetic seals, electronic packages, feedthroughs, and components that need tight dimensional control during thermal cycling. Moreover, these foils are utilized in sensors, vacuum tubes, and other applications where metal-to-glass or metal-to-ceramic sealing is essential. The blend of thermal compatibility, mechanical reliability, and corrosion resistance makes Kovar Foils a top choice for advanced electronic and precision engineering needs.
Kovar foil, an alloy of iron, cobalt and nickel, is primarily used in applications requiring low thermal expansion (CTE) and high mechanical strength In the electronics industry it is often used for hermetic sealing , especially vacuum tubes, semiconductor packages and sensors Cover foil used in construction With the ability to provide thermal expansion of glass the combination meets materials with different thermal properties in air and space as well as coatings on soft surfaces in the automotive industry make them ideal for use in glass and metal coins.
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Bangkok, Thailand
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