|Material:||Ni: 29% Co:18%||Shape:||Wire, Strip, Sheet, Rod|
soft magnetic alloy,
Glass Sealed Iron-Nickel-Cobalt Alloy 4j29 / Ni29Co18 / UNS K94610 / Kovar Expansion Alloy Strip
Kovar is a nominal 29%Ni-17%Co-54%Fe alloy that is a well-known glass-sealing alloy suitable for sealing to hard glasses. Kovar has a nominal expansion coefficient of approximately 5 ppm/°C and inflection temperature of ~450 °C (840 °F).
Kovar (ASTM F15) has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials. This alloy has found wide application in power tubes, microwave tubes, transistors, and diodes. In integrated circuits, it has been used for the flat pack and the dual-in-line package.
|Kovar||Max 0.03||Max 0.020||Max 0.020||Max 0.50||Max 0.30||Max 0.20||Max 0.20||Max 0.20||28.5-29.5||16.8-17.8||Bal.|
|Grade||Tensile Strength N/mm²|
|Soft||1/4 Hard||1/2 Hard||3/4 Hard||Full Hard|
Coefficient of Expansion
|Alloy||Linear Coefficient of Thermal Expansion ā,10-6/℃|
Kovar Wire: ￠0.1mm-￠9mm
Kovar Bar: ￠11mm-￠200mm
Kovar Strip: 75-110mm*0.15-22mm.
Invar 36, also known as FeNi36, is iron-nickel alloys have low coefficients of expansion over only a rather narrow range of temperature. It has a low coefficient of expansion from cryogenic temperatures to about 260℃. In the dry air at home temperature, invar 36 has good resistance to corrosion. But in moist air, it may go corrosion.
Invar 36 is suitable for the applications who require low coefficient of expansion, such as production, storage and transportation of liquid gas, temperature regulation devices working below 200℃, aperture mask, unit frameworks working below -200℃ and so on.
|Invar 36||Max 0.05||Max 0.30||Max 0.020||Max 0.020||0.20-0.60||35.0-37.0||Bal.|
|Invar 36||K93600||1.3912||ASTM B388/B753|
|Invar 36||8.1 g/cm3||1430°C|
Coefficient of Expansion
Invar 36 wire, bar, rod, strip, forging, plate, sheet, tube, fastener and other standard forms are available.
Shanghai Tankii Alloy Material Co., Ltd. specialized in production of thermocouple wire, thermocouple cable, thermocouple connector, and other thermocouple products.
Based on the principle of “first quality, sincere service”, our managing ideology is pursuing technology innovation and creating the top brand in the alloy field. We persist in Quality - the foundation of the survival. It is our forever ideology to serve you with full heart and soul. We committed to provide customers all over the world with high-quality, competitive products and perfect service.
Our products, such us nichrome wire, nichrome strip, fecral wire, fecral strip, thermocouple wire, nickel wire, nickel strip have been exported to Europe, USA, India, Southest Asia, South America,etc.
We are willing to establish strong and long-time partnership with our customers
Your inquiry is a gift for us, your reply is a trust to us, your trust will bring us to provide you the best services in the business.
Contact Person: tankii