Alloy 52

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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.

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