Alloy 52
Alloy 52 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
| Ni | Fe | C | P | Si | Co | Mn | Al | S |
|---|---|---|---|---|---|---|---|---|
| - | - | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ |
| 51.5~52.5 | 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 |
|---|---|---|---|---|---|
| Alloy 52 | 16.7 | 502J | 8.25 | 0.43 | 520 |
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 | 10.3 | 10.4 | 10.2 | 10.3 | 10.3 | 10.3 | 10.8 | 11.2 |
Alloy 52 alloy is mainly used for and soft lead glass sealing, small tube fuses.