CuNi Alloy Constantan/Copper Nickel Alloy/Resistance Wire/Electric Heating Wire

• Customization: Available
• After-sales Service: Available
• Warranty: 3 Years
• Model NO.: INNOVAT
• Material: Copper Nikel
• Cross Sectional Shape: Round
• Application: Protecting Mesh, Fence Mesh, Ironing Machines
• Type: Alloy
• Wide in Width: 0.1-12mm
• Surface Treatment: /
• Metal Wire Drawing: /
• Status: In Hard State
• Thickness: Metal Filament
• Flat Wire Thickness: 0.0009-0.031inch
• Transport Package: Plywood Case
• Specification: CuNi1-CuNi44
• Trademark: INNOVAT
• Origin: China
• HS Code: 7408229000
• Production Capacity: 500000

Product Description

Constantan is a resistance alloy with copper and nickel as the main component. It has a low resistance temperature
coefficient, a wide range of operating temperature (below 480ºC), excellent processing performance, has good welding
performance and so on. It is mainly used for making electronic components in instrumentation, electronics and industrial
equipment.
In addition, there is a new conatantan resistance alloy, copper iron based alloy, it has the same resistivity as constantan,
basically similar resistance temperature coefficient, and the same temperature.
Constantan wire is widely used for making electric heating elements in home appliances and industrial furnaces. Typical
applications are flat irons, ironing machines, water heaters, plastic moulding dies, soldering irons, metal sheathed tubular
elements and cartridge elements.

Our resistance heating alloys are available in the following product forms and sizes:
Round wire size:	0.10-12 mm (0.00394-0.472 inch)
Ribbon (flat wire) thickness and width	0.023-0.8(0.0009-0.031inch)                                                                                  0.038-4 mm (0.0015-0.157 inch)
Width:	Width/thickness ratio max 40, depending on alloy and tolerance
strip:	thickness 0.10-5 mm (0.00394-0.1968 inch), width 5-200 mm (0.1968-7.874 inch)
Other sizes are available on request.

Properties\ Grade		CuNi1	CuNi2	CuNi6	CuNi8	CuMn3	CuNi10	CuNi14
Main Chemical Composition%	Ni	1	2	6	8	_	10	14
	Mn	_	_	_	_	3		0.3
	Cu	Rest	Rest	Rest	Rest	Rest		Rest
Max Work Temp(ºC)		200	200	200	250	200	250	300
Resisivity 20ºC(Ωmm2/m)		0.03	0.05	0.10	0.12	0.12	0.15	0.20
Density(g/cm3)		8.9	8.9	8.9	8.9	8.8	8.9	8.9
Thermal Conductivity (α×10-6/ºC)		<100	<120	<60	<57	<38	<50	<30
Tensile Strength (Mpa)		≥210	≥220	≥250	≥270	≥290	≥290	≥310
EMF vs Cu (μV/oC)(0~100oC)		-8	-12	-12	-22	_	-25	-28
Melting Point (ºC)		1085	1090	1095	1097	1050	1100	1115
Micrographic Structure		austenite	austenite	austenite	austenite	austenite	austenite	austenite

Properties\ Grade		CuNi19	CuNi23	CuNi30	CuNi34	CuNi44
Main Chemical Composition%	Ni	19	23	30	34	44
	Mn	0.5	0.5	1.0	1.0	1.0
	Cu	Rest	Rest	Rest	Rest	Rest
Max Work Temp(ºC)		300	300	350	350	400
Resisivity 20ºC(Ωmm2/m)		0.25	0.30	0.35	0.40	0.49
Density(g/cm3)		8.9	8.9	8.9	8.9	8.9
Thermal Conductivity (α×10-6/ºC)		<25	<16	<10	<0	<-6
Tensile Strength (Mpa)		≥340	≥350	≥400	≥400	≥420
EMF vs Cu (μV/oC)(0~100oC)		-32	-34	-37	-39	-43
Melting Point (ºC)		1135	1150	1170	1180	1280
Micrographic Structure		austenite	austenite	austenite	austenite	austenite