Expansion Alloy Wire

Posted by taeminjiayuan on April 4th, 2017

Expansion alloy ( Widely known as Kovar alloy or Invar alloy) having a specific coefficient of thermal expansion, also it has good sealing properties, weldability, corrosion resistance, workability and ease of machinability, and within the temperature range is not allowed to cause expansion characteristics significant changes in the phase transition.

Expansion alloys in the manufacturing process must be accurate control of chemical composition of the alloy, and its products can include rod, sheet, strip, wire and tube.

OHMALLOY can provide the expansion alloy in wire form and the following grade:

1. Chemical composition(%)

Grade	C	Si	Mn	P	S	Ni	Co	Fe
4J29	0.015	0.12	0.25	0.006	0.005	29.10	17.3	Bal
4J33	0.03	0.12	0.26	0.006	0.005	33.1	14.5	Bal
4J42	0.03	0.12	0.50	0.006	0.005	41.7	0.05	Bal
4J50	0.03	0.12	0.50	0.006	0.005	50	1.0	Bal

2. Physical properties

Grade	Density(g/cm3)	Thermal expansion coefficient (10-6/℃)	Curie point(℃)	Volume resistivity(μΩ.cm)	Thermal conductivity(W/m. ℃)
4J29	8.17	5.0(20~300℃) 5.2(20~450℃	430	46(20℃)	20.3
4J33	8.16	6.4(20~400℃) 6.9(20~500℃	440	44(20℃)	18.6
4J42	8.14	4.8(20~300℃) 6.9(20~450℃)	350	62(20℃)	15.5
4J50	8.21	9.4(20~400℃) 9.7(20~500℃)	500	44(20℃)	16.7

OHMALLOY can make the wire from dia 0.05mm to 8mm. The rod dia from 8mm to 200mm.

company:
Ohmalloy Material Co.,Ltd

phone:021-66796338

email:sales@ohmalloy.com

contact:Michael Qiu

website:http://www.alloywirecable.com/product/expansion-alloy-wire.html

Like it? Share it!

About the Author

taeminjiayuan
Joined: April 3rd, 2017
Articles Posted: 18

Expansion Alloy Wire

Like it? Share it!

About the Author

More by this author