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Feni Expansion Alloy 4j50, Vacovit 500, Nilo51, Ns-1

Description

4J50 is mainly composed of iron, nickel elements. It is characterized with a fixed coefficient of expansion.

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FeNi Expansion Alloy 4J50,Vacovit 500,Nilo51,Ns-1

4J50 the other common Name: 50H, N50, Vacovit 500, FeNi50, Nilo51, Ns-1


4J50 is mainly composed of iron, nickel elements. It is characterized with a fixed coefficient of expansion.

FeNi Glass Sealing Alloys
Grade4J42,4J45,4J50,4J52,4J54
SizeStrip:(0.03-0.1)mm*(180-250)mm
(0.1-1.0)mm*(10-250)mm
(1.0-3.0)mm*(100-250)mm
Wire:0.1-6.0mm
Bar:20-100mm(Hot forging)
       2.0-20mm(Cold drawing)
FeaturesIt has a certain linear expansion coefficient in a certain temperature rang
ApplicationUsed as soft glass or ceraimc sealing material in the electric vacuum industry.

Normal composition%

GradeCPSMnSiAlNiCoFe
4J42≤0.05≤0.02≤0.02≤0.8≤0.3≤0.141.5-42.5≤1.0Bal.
4J45≤0.05≤0.02≤0.02≤0.8≤0.3≤0.144.5-45.5/Bal.
4J50≤0.05≤0.02≤0.02≤0.8≤0.3≤0.149.5-50.5/Bal.
4J52≤0.05≤0.02≤0.02≤0.6≤0.3/51.5-52.5/Bal.
4J54≤0.05≤0.02≤0.02≤0.6≤0.3/53.5-54.5/Bal.


4J50 Typical Physical properties

Density (g/cm3)8.21
Electrical resistivity at 20ºC(ohm.mm2/m)0.44
Thermal conductivity, λ/ W/(m*ºC)16.7
Curie point   Tc/ ºC500
Elastic Modulus,  E/ Gpa158


4J50 Coefficient of expansion

θ/ºCα1/10-6ºC-1θ/ºCα1/10-6ºC-1
20~1009.820~4009.4
20~2009.820~4509.4
20~3009.520~5009.7
20~3509.420~60010.6


 The heat treatment process

Annealing Heated to 900 ±20ºC in a hydrogen atmosphere
Holding time, h1 hour
coolingWith speed not more than 5 ºC / min. cooling to below 200 ºC



精密合金图

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