Anucha Metals, a reputable manufacturer and supplier based in Bangkok, Thailand, is dedicated to providing top-notch Kovar Bars and Rods for a variety of industrial uses. With a strong focus on precision and quality, the company offers Kovar products that meet the rigorous demands of the electrical, electronic, and aerospace industries. Kovar is well-regarded for its controlled thermal expansion and exceptional dimensional stability, making it a go-to choice for applications that require a reliable bond between metal and glass. Anucha Metals prides itself on delivering a dependable supply, superior finishes, and strict compliance with international standards to ensure outstanding performance.
Kovar Bars and Rods are primarily made up of nickel (29%), cobalt (17%), and iron (the balance), along with trace amounts of manganese and silicon. This distinctive composition provides excellent thermal expansion properties that work well with borosilicate glass. On the mechanical side, Kovar boasts high strength, good hardness, and dependable toughness across various conditions. It remains stable even with temperature changes, which helps prevent cracking or deformation. Its density and controlled expansion coefficient make it perfect for hermetic sealing applications, ensuring consistent performance in high-precision engineering settings.
| Standards : | UNS K94610 | Werkstoff Nr 1.3981 | DIN 17745 | ASTM F15 | AMS 7726 | AFNOR NF A54-301 | S.E.W 385 |
| Size Range : | 0.015″ Thk up to 2″ Thk |
| Thickness : | Range from .008″ to .0125″ |
| Length : | 2m, 2.44m, 3m, or as required |
| Width : | 10-2500mm |
| Weight % | Ni | Fe | Co | C | Mn | Si | Al | Cr | Mg | Zr | Ti | Cu | Mo |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alloy K Kovar | 29.0 | 53.0 | 17.0 | 0.04 max | 0.50 max | 0.20 | 0.10 max | 0.20 max | 0.10 max | 0.10 max | 0.10 max | 0.20 max | 0.20 max |
| 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 |
Kovar rods, primarily composed of iron, cobalt, and nickel, are resistant to galvanic corrosion due to their similar electrochemical properties with most alloys, reducing the risk when paired with compatible materials.
Yes, Kovar bar can be welded, but it requires special techniques and precautions due to its unique composition and thermal expansion properties. Proper heat control and filler metals are essential.
Kovar rods typically come in diameters ranging from 1/8" to 4" and lengths of up to 12 feet. Finishes include mill, polished, and brushed surfaces for various applications.
Kovar Bars and Rods find extensive use in industries where precision and reliability are paramount. They are particularly suited for creating glass-to-metal seals in electronics, vacuum tubes, semiconductors, and microwave devices. Their controlled thermal expansion is crucial in aerospace and defense systems for components that face extreme conditions. Moreover, Kovar is commonly utilized in medical devices, optical systems, and telecommunications equipment. Its ability to maintain integrity during temperature fluctuations guarantees long-lasting and reliable performance. As a result, Kovar continues to be the material of choice for specialized applications that demand unmatched durability and dimensional stability.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Anucha Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Bangkok, Thailand
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