FeNi42 Thermal Expansion Alloy

FeNi42 Thermal Expansion Alloy
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Introduction:
The expansion coefficient and curie point of this FeNi42 thermal expansion alloy increase with the increase of nickel content. This alloy is widely used in electric vacuum industry as sealing structure material.

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 D=8~100mm L=50~1000mm
Chemical composition (%)
Ni 41.5~42.5 Fe Bal. Co - 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) 8.12
Resistivity under 20℃(Ωmm2/m) 0.61
Thermal conductivity, λ/ W/(m*℃) 14.6
Curie point, Tc/ ℃ 360
Elasticity modulus, E/ Gpa 147
Expansion coefficient
θ/℃ α1/10-6℃-1 θ/℃ α1/10-6℃-1
20~100 5.6 20~400 5.9
20~200 4.9 20~450 6.9
20~300 4.8 20~500 7.8
20~350 4.95 20~600 9.2
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 pipe

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