Send Message

QUALITY BEST, INTEGRITY FIRST.

www.ohmalloy.com

Home
Products
About Us
Factory Tour
Quality Control
Contact Us
Request A Quote
Company News
Home ProductsLow Expansion Alloys

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

I'm Online Chat Now
Certification
China Ohmalloy Material Co.,Ltd certification
China Ohmalloy Material Co.,Ltd certification
I search for Nichrome plate long time, and successfully bought it from Ohmalloy material. OHMALLOY provide real good service in alloy service and can always help me in finding the correct resistance alloy.

—— Mike Harness

OHMALLOY can provie me only 1kg Kovar alloy wire 1.0mm with short time, that is really amazing. Thanks

—— Janey

Really professional in thermocouple wire and cable, what i want just can get from OHMALLOY

—— Chris

Enamelled Constantan 0.08mm, i never expect to get only 2kg of it. But OHMALLOY supply it to me with good quality. God Jesus! Such a reliable supplier from china

—— Aaron

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

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

Large Image :  4J50 Low Thermal Expansion Metals And Alloy Sealant Alloy For Electric Vacuum Industry Get Best Price

Product Details:
Place of Origin: China(Shanghai)
Brand Name: OHMALLOY
Certification: ISO,SGS
Model Number: 4J50
Payment & Shipping Terms:
Minimum Order Quantity: 20kg
Price: negotiable
Packaging Details: In Wooden Box
Delivery Time: 7-20 Days after your deposit recieved
Supply Ability: 5000kg/month
Detailed Product Description
High Light:

invar alloy

,

kovar alloy

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 0

Contact Details
Ohmalloy Material Co.,Ltd

Contact Person: Mr. Qiu

Tel: +8613795230939

Send your inquiry directly to us