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4J50 Low Thermal Expansion Metals And Alloy Sealant Alloy For Electric Vacuum Industry

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4J50 Low Thermal Expansion Metals And Alloy Sealant Alloy For Electric Vacuum Industry

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Brand Name : OHMALLOY

Model Number : 4J50

Certification : ISO，SGS

Place of Origin : China(Shanghai)

MOQ : 20kg

Price : negotiable

Supply Ability : 5000kg/month

Delivery Time : 7-20 Days after your deposit recieved

Packaging Details : In Wooden Box

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OhmAlloy-4J33 (Expansion alloy)


(Common Name: 33НК, 4J33, KV-4, Ni33Co17)

4J33 alloy has a close Linear expansion coefficient with 95% Al2O3 ceramic in the range of -60 to 600 degrees Celsius. it is an Important sealing structural material in the electric vacuum industry; Mainly used for matching and ceramic sealing.

Normal composition%

Ni 32.0~33.6 Fe Bal. Co 14.0~15.2 Si ≤0.3
Mo - Cu - Cr - Mn ≤0.5
C ≤0.05 P ≤0.02 S ≤0.02

Typical Physical properties

Density (g/cm3) 8.27
Electrical resistivity at 20℃(Ωmm2/m) 0.46
Thermal conductivity, λ/ W/(m*℃) 17.6
Curie point Tc/ ℃ 440
Elastic Modulus, E/ Gpa 139

Coefficient of expansion

θ/℃ α1/10-6℃-1 θ/℃ α1/10-6℃-1
20~300 6.3 20~400 6.1
20~500 6.9 20~600 8.3

Typical Mechanical properties

Tensile Strength Elongation
Mpa %
539 32

The heat treatment process
Stress relief annealing Heating to 470~540℃. Keep 1~2h, cooling in the air
Annealing Heating to 750~ 900℃ In the medium vacuum
Holding time, h 15min. ~ 1 hour
cooling In the air

Style of suppDly

Alloys Name Type Dimension
OhmAlloy-4J33 Wire D= 0.1~8 mm
OhmAlloy-4J33 Strip W= 5~250 mm T= 0.1 mm
OhmAlloy-4J33 Foil W= 10~100 mm T= 0.01~0.1 mm
OhmAlloy-4J33 Bar Dia= 8~100 mm L= 50~1000 mm

4J50 Low Thermal Expansion Metals And Alloy Sealant Alloy For Electric Vacuum Industry


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invar alloy

      

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