Uniseal 42 Glass Sealed Alloy Strip

Product Description

Uniseal 42 Glass Sealed Alloy strip

Iron nickel alloy is obtained at a given temperature range by adjusting the content of nickel internal energy and the expansion coefficient of different soft glass and ceramic matching a series of expansion alloy, its expansion coefficient and the Curie temperature increases with the increase of nickel content.The assembly is widely used in electric vacuum industry the sealing structure of the material

Chemical Composition in %, Invar

brand	Chemical composition
	Ni	Fe	C	P	Si	Co	Mn	Al	S
			≤
Uniseal 42	41.5~42.5	Bal	0.05	0.02	0.3	-	0.80	0.10	0.02
4j45	44.5~45.5	Bal	0.05	0.02	0.3	-	0.80	0.10	0.02
4j50	49.5~50.5	Bal	0.05	0.02	0.3	1.0	0.80	0.10	0.02
4j52	51.5~52.5	Bal	0.05	0.02	0.3	-	0.60	-	0.02
4j54	53.5~54.5	Bal	0.05	0.02	0.3	-	0.60	-	0.02

 

Basic physical constants and mechanical properties of the alloy:

brand	Thermal conductivity	Specific heat capacity	Density	Electric resistivity	Curie point
Uniseal 42	14.6	502J	8.12	0.61	360

Typical expansion character(10 -6 / ºC )
Temperature range	20~100	20~200	20~300	20~350	20~400	20~450	20~500	20~600
Expansion coefficient	5.6	4.9	4.8	4.95	5.9	6.9	7.8	9.2

 

Uniseal 42 alloy is mainly used for soft glass and ceramic seal, such as electron tubes, transistors and integrated circuit of fuses, framework, and the sealing plug