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Iron Nickel Base Nilo50 Low Expansion Alloys 4J50 For Electric Vacuum Industry

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Iron Nickel Base Nilo50 Low Expansion Alloys 4J50 For Electric Vacuum Industry

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Brand Name : OHMALLOY

Model Number : 4J50

Certification : ISO9001-2008

Place of Origin : China(Shanghai）

MOQ : 20KG

Price : negotiable

Payment Terms : L/C, T/T, , MoneyGram

Supply Ability : 50 Tons per month

Delivery Time : 7-10 days

Packaging Details : in spool/ carton packed

Material : FeNi50

Density (g/cm3) : 8.21

Electrical resistivity at 20℃(Ωmm2/m) : 0.44

Tensile Strength : 490Mpa

Elongation : 35%

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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 20℃(Ωmm2/m) 0.44
Thermal conductivity, λ/ W/(m*℃) 16.7
Curie point Tc/ ℃ 500
Elastic Modulus, E/ Gpa 158

Coefficient of expansion

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

Typical Mechanical properties

Tensile Strength Elongation
Mpa %
490 35

The heat treatment process
Annealing Heated to 900 ±20℃ in a hydrogen atmosphere
Holding time, h 1 hour
cooling With speed not more than 5 ℃ / min. cooling to below 200 ℃

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

Product Tags:

invar alloy

      

thermal expansion invar

      
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