4J34
4J34 is a ceramic sealing alloy developed based on my country’s ceramic characteristics. The alloy has a linear expansion coefficient similar to that of 95% Al2O3 ceramics in the temperature range of -60°C to 600°C.
4J34
Product Description:
4J34 is a ceramic sealing alloy developed based on my country’s ceramic characteristics. The alloy has a linear expansion coefficient similar to that of 95% Al2O3 ceramics in the temperature range of -60°C to 600°C.
Physical properties:
Melting point: 1450℃
Density: 8.29g/cm³
Resistivity: 0.45μΩ·m
Extreme chemical composition:
C≤0.05
Mn≤0.50
Si≤0.30
P≤0.020
S≤0.020
Ni: 28.5～29.5
Co: 19.5～20.5
Fe: balance
Coefficient of expansion:
Expansion coefficient in the following temperature ranges /（×10-6/℃-1） | |||||
20-400℃ | 20-600℃ | 20-300℃ | 20-400℃ | 20-500℃ | 20-600℃ |
6.3-7.1 | 7.8-8.5 | 6.8 | 6.4 | 6.8 | 8.2 |
characteristic:
It has stability and anti-oxidation properties in high-temperature environments, and can withstand high-temperature corrosion and high-temperature creep;
Excellent magnetic properties
Application areas:
It is mainly used for matching sealing with ceramics and is an important sealing structural material in the electric vacuum industry.
form:
Rod, plate, strip, wire, tube