Luois Metals, a reputable manufacturer and supplier based in Houston, USA, specializes in high-quality Kovar Bars and Rods that are designed for outstanding thermal expansion compatibility and mechanical stability. These products are particularly known for their remarkable ability to align with the thermal expansion of borosilicate glass and ceramics. Each bar and rod is crafted with precision to meet international standards, ensuring they boast a superior surface finish, precise dimensions, and a long-lasting service life. Kovar Bars and Rods from Luois Metals are perfect for critical applications in fields like electronics, glass-to-metal seals, semiconductor packaging, aerospace, and precision instrumentation, where thermal matching and reliability are crucial.
The composition of Kovar Bars and Rods primarily includes iron, nickel, and cobalt, along with carefully measured amounts of other alloying elements to regulate thermal expansion and boost mechanical strength. This unique blend offers excellent resistance to thermal fatigue, dimensional changes, and mechanical stress, all while maintaining impressive tensile strength, ductility, and toughness. Mechanically, they perform consistently well under repeated thermal cycling, ensuring accuracy and dependability in demanding situations where temperature variations are frequent.
| 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 glass-to-metal seals, electronic vacuum tubes, semiconductor components, aerospace instrumentation, sensors, and precision optical devices. They are also utilized in hermetic seals, high-vacuum equipment, and various assemblies where it’s vital to match the thermal expansion of metals and glass. Their blend of mechanical stability, low thermal expansion, and corrosion resistance makes them essential for high-precision engineering applications. Luois Metals stands behind the superior quality, durability, and performance of its Kovar Bars and Rods, making them the go-to choice for industries that require reliability and dimensional consistency in fluctuating thermal conditions.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Louis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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