Neith Metals, located in Cairo, Egypt, stands out as a top manufacturer and supplier of high-quality metallurgical products, with a focus on Kovar bars and rods. Renowned for their precision, quality, and dependability, Neith Metals serves industries that require materials capable of performing consistently even in extreme conditions. Thanks to their advanced production techniques and rigorous quality control measures, the company guarantees that each Kovar bar and rod adheres to international standards. These products are celebrated for their remarkable dimensional stability and controlled thermal expansion, making them perfect for precision engineering, electronic packaging, and sealing applications. Neith Metals is dedicated to providing robust, high-performance solutions tailored to meet the unique needs of various industrial sectors.
Kovar bars and rods are made from iron-nickel-cobalt alloys, typically containing 29% nickel, 17% cobalt, and the rest iron. This specific blend results in a low coefficient of thermal expansion that closely aligns with borosilicate glass and ceramics. On a mechanical level, Kovar is known for its high strength, toughness, and outstanding thermal stability, which helps it resist deformation when temperatures fluctuate. Its predictable expansion and mechanical durability make it an excellent choice for precision joining and sealing tasks. With superb dimensional control, Kovar bars and rods maintain their integrity and reliability even in challenging industrial and electronic 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 that demand precise thermal and mechanical performance. They are particularly well-suited for glass-to-metal and ceramic-to-metal sealing, electronic packaging, hermetic feedthroughs, and components in vacuum tubes or semiconductors. Their low thermal expansion guarantees reliable bonding with materials like borosilicate glass, while their strength and toughness ensure durability in mechanical assemblies. Kovar plays a crucial role in aerospace, electronics, medical devices, and high-precision instrumentation, where consistent performance and dimensional stability under thermal stress are essential.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Neith Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Alexandria, Egypt
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