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Smith Fittings, a top-notch manufacturer and supplier located in Canberra, Australia, focuses on crafting high-quality **Kovar Foils** tailored to meet the rigorous demands of the aerospace, electronics, and engineering sectors. Renowned for its precise thermal expansion properties and outstanding dimensional stability, Kovar Foil is perfect for applications that require metal-to-glass or metal-to-ceramic bonding. At Smith Fittings, we take pride in producing our Kovar Foils with exceptional accuracy, corrosion resistance, and strength, ensuring they perform reliably in critical environments. Our commitment is to provide precision-engineered materials that adhere to global quality standards for both industrial and scientific uses.
**Kovar Foil** is a nickel-cobalt ferrous alloy that consists of about **29% nickel, 17% cobalt, and the rest iron**. This distinctive blend gives it a thermal expansion rate that closely aligns with that of borosilicate glass and ceramics. It boasts a **tensile strength of around 520 MPa**, impressive thermal stability, and good ductility. Kovar also features low thermal conductivity and magnetic permeability, making it a high performer in environments with fluctuating temperatures. Its ability to maintain structural integrity makes it a go-to choice for precision sealing and 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.
Kovar foil is a high-performance alloy made primarily of iron, nickel and cobalt, which offers exceptional benefits in specialized applications. Its low thermal expansion makes it ideal for glass coatings on metals in electronics, ensuring stability under temperature changes Coatings are also highly resistant to thermal cycling, providing durability in internal environments is strong. Its excellent mechanical properties and ease of manufacture make it suitable for precisely complex designs, while the ability to maintain excellent performance at high temperatures ensures reliable performance at aerospace, electronics and pharmaceutical industries.
**Kovar Foil** finds its place in industries that require precise thermal compatibility and stability. It plays a crucial role in the **production of glass-to-metal seals**, **electronic components**, **vacuum devices**, **semiconductor packages**, and **instrument housings**. The aerospace and defense industries utilize it for hermetic sealing applications and electronic assemblies that face extreme conditions. In scientific instrumentation, Kovar Foil guarantees accuracy and reliability by reducing distortion under thermal stress. Its unique expansion characteristics and durability make it essential for high-performance electrical, optical, and electronic applications.
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