4j50 (Expansion-alloy) 50h, N50, Vacovit 500, Feni50

Product Details
Customization: Available
Transport Package: Plywood
Specification: 0.02mm-10mm
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  • 4j50 (Expansion-alloy) 50h, N50, Vacovit 500, Feni50
  • 4j50 (Expansion-alloy) 50h, N50, Vacovit 500, Feni50
  • 4j50 (Expansion-alloy) 50h, N50, Vacovit 500, Feni50
  • 4j50 (Expansion-alloy) 50h, N50, Vacovit 500, Feni50
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Basic Info.

Model NO.
4J50
Trademark
Ohmalloy
Origin
China
Production Capacity
8000/Week

Product Description

OhmAlloy-4J50  (Expansion alloy)

(Common Name: 50H, N50, Vacovit 500, FeNi50)
4J50 alloy is mainly composed of iron, nickel elements. It is characterized with a fixed coefficient of expansion. Increase the thermal expansion coefficient and the Curie point with increase of nickel content.
4J50 alloy is widely used the structure of the sealing material in the electric vacuum industry.
Normal 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

Typical Physical properties

Density (g/cm3) 8.21
Electrical resistivity at 20ºC(Ωmm2/m) 0.44
Thermal conductivity, λ/ W/(m*ºC) 16.7
Curie point   Tc/ ºC 500
Elastic Modulus,  E/ Gpa 158
Coefficient of expansion
θ/ºC α1/10-6ºC-1 θ/ºC α1/10-6ºC-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

Typical Mechanical properties

Tensile Strength Elongation
Mpa %
490 35
 
The heat treatment process
Annealing Heated to 900 ±20ºC in a hydrogen atmosphere
Holding time, h 1 hour
cooling With speed not more than 5 ºC / min. cooling to below 200 ºC

Style of supply
Alloys Name Type Dimension  
OhmAlloy-4J50 Wire D= 0.1~8mm  
OhmAlloy-4J50 Strip W= 5~250mm T= 0.1mm
OhmAlloy-4J50 Foil W= 10~100mm T= 0.01~0.1
OhmAlloy-4J50 Bar Dia= 8~100mm L= 50~1000


 

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