Mourad Metals is a trusted manufacturer and supplier located in Tunis, Tunisia, specializing in high-quality Kovar Bars and Rods. These products are perfect for applications that need controlled thermal expansion and exceptional sealing performance. The company follows rigorous quality standards and employs advanced manufacturing techniques to guarantee consistent material properties and precise dimensions. Catering to various industries like electronics, aerospace, telecommunications, and precision engineering, Mourad Metals customizes Kovar products to meet specific customer needs. With a strong emphasis on performance, reliability, and timely delivery, Mourad Metals has established itself as a go-to source for Kovar Bar and Rod solutions both regionally and internationally.
Kovar Bars and Rods are made from nickel–cobalt–iron alloys, typically featuring about 29% nickel, 17% cobalt, and the rest iron. This specific blend results in a controlled coefficient of thermal expansion that closely aligns with borosilicate glass and ceramics. On the mechanical side, Kovar boasts moderate tensile strength, good ductility, and stable performance across a wide temperature range. It’s also easy to machine and can be welded or brazed with ease, making it ideal for hermetic sealing and precision assemblies.
| 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.
These Kovar Bars and Rods find their way into various applications that require glass-to-metal or ceramic-to-metal sealing. You’ll commonly see them in electronic packages, vacuum tubes, transistors, semiconductor components, and microwave devices. They’re also utilized in aerospace and defense systems, optical assemblies, and telecommunications equipment. Thanks to Kovar’s controlled thermal expansion and dependable mechanical properties, they ensure robust, leak-tight seals and long-lasting performance in high-reliability electronic and scientific applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Mourad Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Tunis, Tunisia
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