4j50 Strip Feni50 N50 Low Coefficient of Expansion Alloy for Sealing Material in The Electric Vacuum Industry

China 4j50 Strip Feni50 N50 Low Coefficient of Expansion Alloy for Sealing Material in The Electric Vacuum Industry, Find details about China Sealing Material, 4j50 from 4j50 Strip Feni50 N50 Low Coefficient of Expansion Alloy for Sealing Material in The Electric Vacuum Industry

Basic Info.

Model NO.

4J50

Model NO.

4J50

Package size per unit product

45.00cm * 45.00cm * 60.00cm

Gross weight per unit product

15.000kg

Product Desciption

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 pointT_c/ 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 to900 ±20ºCin 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