Semih Metals, located in Istanbul, Turkey, has built a solid reputation as a reliable manufacturer and supplier of top-notch Kovar Bar and Rod products. They cater to industries that prioritize precision, dependability, and outstanding material performance. With years of experience in specialty alloys, this company delivers high-quality solutions specifically designed for aerospace, electronics, telecommunications, and scientific applications. Renowned for their rigorous quality control, prompt delivery, and customer-centric approach, Semih Metals guarantees that their Kovar products adhere to international standards. By merging cutting-edge manufacturing techniques with extensive metallurgical expertise, they have positioned themselves as a trusted partner for clients around the globe who are in search of excellence in Kovar materials.
The Kovar Bar and Rod offered by Semih Metals is an iron-nickel-cobalt alloy, typically composed of about 29% nickel, 17% cobalt, and the remainder iron, along with trace amounts of manganese, silicon, and carbon. This alloy is celebrated for its controlled coefficient of thermal expansion, which closely aligns with that of hard glass and ceramics. Kovar is known for its remarkable dimensional stability, impressive tensile strength, and good machinability. Its mechanical properties include a tensile strength of roughly 520 MPa, a yield strength of about 345 MPa, and exceptional performance under thermal cycling 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 Bar and Rod from Semih Metals finds extensive use in industries that require robust hermetic seals between metal and glass or ceramics. Its distinctive thermal expansion properties make it crucial for creating glass-to-metal and ceramic-to-metal seals. Key applications encompass electronic packaging, vacuum tubes, power transistors, diodes, microwave devices, and hybrid circuits. In the aerospace and defense sectors, Kovar is highly regarded for its reliability in high-performance electronic systems. It also plays a vital role in medical devices, instrumentation, and scientific research equipment. By ensuring precision and stability, Kovar significantly contributes to the advancement of modern technology and engineering innovations.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Semih Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Istanbul, Turkey
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