FeNi50 Thermal Expansion Alloy

FeNi50 Thermal Expansion Alloy
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Introduction:
FeNi50 thermal expansion alloy is a controlled expansion alloy obtained by adjusting the nickel content. And its expansion coefficient and curie point increase with the increase of nickel content. This thermal expansion alloy is a widely used sealing material in electric vacuum industry.

Supply of thermal expansion alloy
Style Size
Wire D=0.1~8mm
Strip W= 5~250mm T= 0.1mm
Foil W= 10~100mm T= 0.01~0.1mm
Rod Dia=8~100mm L=50~1000mm
Chemical composition (%)
Ni 49.5~50.5 Fe Bal. Co 1.0 Si ≤0.3
Mo - Cu - Cr - Mn ≤0.8
C ≤0.05 P ≤0.02 S ≤0.02 Al ≤0.1
Physical property
Density (g/cm3) 8.21
Resistivity under 20℃(Ωmm2/m) 0.44
Thermal conductivity, λ/ W/(m*℃) 16.7
Curie point, Tc/ ℃ 500
Elasticity modulus, E/ Gpa 158
Expansion coefficient
θ/℃ α1/10-6℃-1 θ/℃ α1/10-6℃-1
20~100 9.8 20~400 9.4
20~200 9.8 20~450 9.4
20~300 9.5 20~500 9.7
20~350 9.4 20~600 10.6
Mechanical property
Tensile Strength (Mpa) Elongation (%)
490 35
Heat treatment process
Annealing Be heated to 900 ±20℃ in hydrogen environment.
Heat preservation (h) 1h
Cooling Be cooled below 200℃ at a speed of no more than 5 ℃ / min.

Index
iron nickel alloy, alloy plate

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