Iron
Fe
Bal.
Nickel
Ni
32.0~33.6%
Cobalt
Co
14.0~15.2%
Manganese
Mn
≤0.5%
Silicon
Si
≤0.3%
Aluminium
Al
≤0.1%
Carbon
C
≤0.05%
Sulphur
S
≤0.02%
Phosphorus
P
≤0.02%
Ni33Co17 is a ceramic sealing alloy that combines the characteristics of Chinese ceramics. The alloy has a linear expansion coefficient similar to that of 95% Al2O3 ceramics in the temperature range of -60~600℃w. It is mainly used for matching and sealing with ceramics. It is an important sealing structure material in the electric vacuum industry.Common name: 33NK, 4J33, KV-4, Ni33Co17
Available shapes:
Ni33Co17 wire, bar, bar, strip, forming, sheet, sheet, tube and other standard shapes are available.
Physical properties
| Density (g/cm3) |
8.27 |
| Resistivity at 20℃(Ωmm2/m) |
0.46 |
| Thermal conductivity, λ/ W/(m*℃) |
17.6 |
| Curie point ,Tc/ ℃ |
440 |
| Elastic modulus, E/ Gpa |
139 |
Coefficient of expansion
| θ/℃ |
α1/10-6℃-1 |
θ/℃ |
α1/10-6℃-1 |
| 20~300 |
6.3 |
20~400 |
6.1 |
| 20~500 |
6.9 |
20~600 |
8.3 |
Mechanical behavior
| Tensile strength |
Elongation |
| Mpa |
% |
| 539 |
32 |
| Product heat treatment proces |
| Annealing |
Heat to 900 ± 20℃ in protective atmosphere or vacuum |
| Holding time, h |
1 h |
| Cooling |
Cool down to below 200 ℃ at a rate of no more than 5 ℃ / min. |
Type of supply
| Alloy grade |
Type |
Sise |
| Ni33Co17 |
Wire |
D= 0.1~8mm |
| Ni33Co17 |
Strip |
W= 5~250mm |
T= 0.1mm |
| Ni33Co17 |
Foil |
W= 10~100mm |
T= 0.01~0.1mm |
| Ni33Co17 |
Bar |
Dia= 8~100mm |
L= 50~1000mm |
