4j50 Iron nickel constant expansion alloy wire FeNi50
Iron nickel alloy is obtained at a given temperature range by adjusting the content of nickel internal energy and the expansion coefficient of different soft glass and ceramic matching a series of expansion alloy, its expansion coefficient and the Curie temperature increases with the increase of nickel content.The assembly is widely used in electric vacuum industry the sealing structure of the material
Chemical Composition in %, Invar
| brand |
Chemical composition |
| Ni |
Fe |
C |
P |
Si |
Co |
Mn |
Al |
S |
| ≤ |
| 4j42 |
41.5~42.5 |
Bal |
0.05 |
0.02 |
0.3 |
- |
0.80 |
0.10 |
0.02 |
| 4j45 |
44.5~45.5 |
Bal |
0.05 |
0.02 |
0.3 |
- |
0.80 |
0.10 |
0.02 |
| 4j50 |
49.5~50.5 |
Bal |
0.05 |
0.02 |
0.3 |
1.0 |
0.80 |
0.10 |
0.02 |
| 4j52 |
51.5~52.5 |
Bal |
0.05 |
0.02 |
0.3 |
- |
0.60 |
- |
0.02 |
| 4j54 |
53.5~54.5 |
Bal |
0.05 |
0.02 |
0.3 |
- |
0.60 |
- |
0.02 |
Basic physical constants and mechanical properties of the alloy:
| brand |
Thermal conductivity |
Specific heat capacity |
Density |
Electric resistivity |
Curie point |
| 4j50 |
16.7 |
502J |
8.21 |
0.44 |
500 |
| Typical expansion character(10 -6 / ºC ) |
| Temperature range |
20~100 |
20~200 |
20~300 |
20~350 |
20~400 |
20~450 |
20~500 |
20~600 |
| Expansion coefficient |
9.8 |
9.8 |
9.5 |
9.4 |
9.4 |
9.4 |
9.7 |
10.6 |
4 j50 alloy is used mainly for precision impedance diaphragm, wet spring, reed relays, precision length measurement, and the corresponding soft sealing glass.
All offered "Huona(Shanghai) New Material Co., Ltd" of rolled metal products Invar differs guaranteed high quality. Customers can buy Invar alloy for the production of different types of products and rely on the high-speed supply of rolled metal.
Audited Supplier 
){kind=link}