Iris Pipes and Tubes, located in Cairo, Egypt, stands out as a top-notch manufacturer and supplier of high-quality Kovar Bars and Rods. The company has built a solid reputation for producing precision-engineered products that cater to the rigorous demands of industries like electronics, aerospace, and instrumentation. Thanks to their cutting-edge manufacturing technology and stringent quality control measures, Iris Pipes and Tubes guarantees that their Kovar Bars and Rods deliver outstanding performance, precise dimensions, and stability even under varying thermal conditions. These bars and rods are specifically crafted to provide a coefficient of thermal expansion that aligns perfectly with glass and ceramics, ensuring reliability in critical applications.
Kovar Bars and Rods are primarily made up of iron, nickel (29%), and cobalt (17%), creating an alloy known for its low thermal expansion and remarkable dimensional stability. This distinctive composition allows for a controlled expansion rate that closely matches that of borosilicate glass and certain ceramics. On the mechanical side, Kovar boasts a tensile strength of about 520 MPa, along with good ductility and magnetic permeability, making it ideal for hermetic sealing and high-precision components. The alloy retains its strength and structure even at high temperatures and through repeated thermal cycling, ensuring consistent performance over time.
| 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 the electronics and aerospace sectors for crafting components that require a tight seal between metal and glass, such as vacuum tubes, transistor leads, and electronic package housings. They’re also utilized in scientific instruments, microwave devices, and sensors due to their thermal compatibility and stability. In the aerospace and defense industries, Kovar is essential for hermetic sealing applications and structural components where precision and reliability are crucial, especially under fluctuating temperatures.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Starc Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Canberra, Australia
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