FeNi50 Thermal Expansion Alloy Manufacturer

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