Isis Metals is a reliable manufacturer and supplier of Kovar Bars and Rods, proudly based in Manila, Philippines. The company focuses on crafting top-notch nickel–cobalt–iron alloys that are specifically designed for controlled thermal expansion, dimensional stability, and outstanding mechanical strength. Using cutting-edge metallurgical techniques and high-quality raw materials, their Kovar Bars and Rods adhere to international standards for precision and dependability. Isis Metals offers these bars and rods in a variety of sizes and finishes, catering to industries like electronics, aerospace, glass-to-metal sealing, precision instrumentation, and scientific equipment, where thermal matching and stability are crucial.
The composition of Kovar Bars and Rods includes nickel (29%), cobalt (17%), and iron (the balance), with small amounts of manganese and silicon added to improve structural stability and workability. This alloy boasts an incredibly low coefficient of thermal expansion, closely aligning with that of borosilicate glass, and delivers a tensile strength ranging from 450 to 700 MPa, along with excellent ductility and high toughness. This makes it perfect for components that need precise dimensional control under fluctuating thermal conditions.
| 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 applications in glass-to-metal seals, electronic vacuum tubes, semiconductor packages, precision instruments, aerospace components, and scientific devices. Their low thermal expansion and dependable mechanical properties guarantee long-lasting dimensional stability, durability, and high performance. These bars and rods are vital for industries that demand temperature-sensitive, precision-engineered materials that maintain their integrity during thermal cycling and in high-precision applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Isis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Manila, Philippines
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