Home > Kovar Foil
Aisha Nickel Alloys, based in Muscat, Oman, offers high-quality Kovar sheets and foils engineered for precision, reliability, and superior performance in specialized applications. Known for their unique ability to match the thermal expansion of glass and ceramics, these sheets and foils are widely trusted in electronics, aerospace, and scientific equipment manufacturing. Each product is carefully manufactured to ensure uniform thickness, excellent surface finish, and consistent quality. With a commitment to technical support, quality control, and timely delivery, Aisha Nickel Alloys provides Kovar sheets and foils that meet the demanding requirements of high-precision industrial applications.
Kovar is an alloy mainly composed of iron (29-17%), nickel (29-17%), cobalt (16-21%), and small amounts of manganese, silicon and carbon. It has excellent thermal expansion properties, which binds to glass, making it ideal for coating glass on metal. Technical properties include high strength, good ductility and thermal and shock resistance. Kovar foil is highly corrosion resistant and maintains its shape and strength at high temperatures. Advantages include glass compatibility for hermetic sealing, excellent performance and thermal stability, making it ideal for electronic, aerospace and electrical applications.
| 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 |
Kovar sheets and foils are primarily composed of nickel, cobalt, and iron, giving them a controlled coefficient of thermal expansion that closely matches that of borosilicate glass and ceramics. They exhibit excellent mechanical strength, toughness, and thermal stability, while maintaining reliable dimensional integrity during heating and cooling cycles. The precise metallurgical composition ensures consistent performance in sealing, welding, and high-precision assembly applications. These properties make Kovar sheets and foils highly dependable in industries that require accuracy, stability, and resistance to thermal stress.
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Kovar sheets and foils are widely used in electronics and semiconductor industries for hermetic sealing of glass-to-metal and ceramic-to-metal assemblies. They are essential in aerospace and scientific instruments where precision and thermal stability are critical. These sheets and foils are also used in vacuum tubes, electrical feedthroughs, and sensors that require matching thermal expansion with glass or ceramic components. Aisha Nickel Alloys ensures every sheet and foil meets strict quality standards, providing reliable performance in high-precision and high-stress applications. Their consistent quality and durability make them an ideal choice for demanding industrial and technological needs.
