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| Brand Name : | JX |
| Model Number : | 4j29 Kovar Alloy Bar |
| Certification : | ISO |
| Price : | Negotiable |
| Payment Terms : | L/C, T/T |
| Supply Ability : | 3000T |
| Delivery Time : | 35days |
Chemical composition:
C≤0.03%
Mn≤0.50%
Si≤0.30%
P≤0.020%
S≤0.020%
Cu≤0.20%
Cr≤0.20%
Mo≤0.20%
Ni=28.5~29.5%
Co=16.8~17.8%
Fe=rest
Grade : Kovar nickel-cobalt ferrous alloy/ 29HK/ 4J29
Classification : the alloy of expansion characteristics
Kovar Alloy Bar Application: Kovar (trademark of CRS Holdings,
inc., Delaware[1]) is a nickel-cobalt ferrous alloy compositionally
identical to Fernico 1, designed to be compatible with the thermal
expansion characteristics of borosilicate glass (~5 × 10?6 /K
between 30 and 200 °C, to ~10 × 10?6 /K at 800 °C) in order to
allow direct mechanical connections over a range of temperatures.
It finds application in electroplated conductors entering glass
envelopes of electronic parts such as vacuum tubes (valves), X-ray
and microwave tubes and some lightbulbs.
Kovar Alloy Bar Chemical Composition in % Kovar
Ni 28,5-29,5% | Fe 51,14-54,5% | C 0.03% | Si 0.3% | Mn 0,4 % | S o 0.015% |
P 0.015% | o 17-18% | Ti 0.1% | Al 0.2% | Cu 0.2% | Cr 0,1 % |
Kovar Alloy Bar picture:



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