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Fajar Metals stands out as a top-notch manufacturer and supplier of precision Kovar Foil, proudly rooted in Jakarta, Indonesia. Kovar, a controlled expansion alloy made mainly of nickel, cobalt, and iron, is specifically crafted for hermetic sealing with borosilicate glass and ceramics. Our Kovar Foil is produced with tight dimensional tolerances, an exceptional surface finish, and superior flatness—making it perfect for microelectronic packaging, semiconductor components, and glass-to-metal seals. Available in custom thicknesses and widths, Fajar Metals’ Kovar Foil adheres to strict international standards like ASTM F15, earning the trust of industries that demand reliable performance in precision, high-temperature, and vacuum environments.
Kovar Foil consists of about 29% nickel, 17% cobalt, and 54% iron, providing an extremely low and controlled coefficient of thermal expansion that aligns closely with borosilicate glass and ceramic materials. It boasts a tensile strength ranging from 517 to 690 MPa, good ductility, and excellent thermal stability up to 450°C. Fajar Metals offers Kovar Foil in either an annealed or cold-rolled condition, featuring smooth, oxidation-free surfaces. The foil’s magnetic and hermetic properties make it ideal for critical sealing and shielding applications, ensuring structural integrity and long-lasting performance in challenging thermal and vacuum environments.
| 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 | |||
| Alloys K Kovar | Annealed | 49,000 | 340 | 75,000 | 520 | 42 |
At Fajar Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Nimonic Sheet and Plates in Jakarta, Indonesia, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Indonesia, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
Kovar Foil finds extensive use in hermetic sealing applications, especially where thermal expansion compatibility with glass or ceramics is crucial. In the electronics sector, it’s utilized in semiconductor packaging, transistor headers, and microwave tubes. The aerospace and defense industries apply it in hybrid microcircuits and precision instrumentation. Additionally, it plays a vital role in medical devices, optoelectronics, and sensor housings, where leak-tight glass-to-metal seals are essential. Fajar Metals provides high-purity Kovar Foil tailored to meet specific critical requirements.
