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Sealing FeNi Low Expansion Alloys For Electric Vacuum Industry

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Sealing FeNi Low Expansion Alloys For Electric Vacuum Industry

Name: Sealing FeNi Low Expansion Alloys For Electric Vacuum Industry
Brand: Ohmalloy
Price: 21 USD

China Sealing FeNi Low Expansion Alloys For Electric Vacuum Industry wholesale

Brand Name : Ohmalloy

Model Number : 4J50

Certification : ISO CE

Place of Origin : China

MOQ : 30kg

Price : USD 21-USD39/KGS

Payment Terms : L/C, T/T

Delivery Time : 15 workdays

Packaging Details : coil

Material : FeNi

Shape : strip

Application : sealing material

Chemical composition : Ni Fe Co V

Product name : 4J50

Density : 8.21g/cm3

Standard : GB ASTM AISI,ASTM/ASME/AISI/GB/DIN

Color : Silvery White,bright

Surface : Bright

Feature : low coeffficient of expansion from Cryogenic temperature

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(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 pointT_c/ ℃	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 to900 ±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

Sealing FeNi Low Expansion Alloys For Electric Vacuum Industry

Product Tags:

FeNi Low Expansion Alloys

Bright Sealing Low Expansion Alloys

FeNi50 Low Expansion Alloys

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