Copper Nickel Alloy Constantan Cupro-Nickel CuNi44 Strip

• Customization: Available
• Type: Copper Wire
• Application: Resistance
• Model NO.: CuNi44
• Shape: Round
• Alloy: Alloy
• Color: Bright
• Standard: GB/T
• Magnetic Property: None
• Condition: Soft 1/4h 1/2h H
• Resistivity: 0.49±5%Ohm mm2/M
• Density(g/cm3): 8.9
• Ultimate Strength (≥ MPa): ≥410
• Conductor Type: Solid
• Ni%: 44
• Elongation: 25%(Min)
• Size: 0.05*5.0-5.0*250mm
• Max Continuous Service Temp: 400ºC
• Transport Package: Carton Box
• Specification: Base on customers′ request
• Trademark: Allotech
• Origin: China
• HS Code: 7409400000
• Production Capacity: 20 Tons Every Month

Product Description

CuNi44, also called Constantan, has a very low temperature coefficient, high electrical resistance, high ductility and non-corroding properties. It is suitable for use at temperatures up to 600° C (1110° F). As a very malleable, very ductile alloy, it has a very good resistance to oxidation.

The alloy is non-magnetic. It is suitable for electrical resistors, potentiometers, heating wires, heating cables and mats. Ribbons are used for heating of bimetals. Another field of application is manufacturing of thermocouples because it develops a high electromotive force (EMF) in association with others metals.

Copper nickel alloy series:Constantan CuNi40 (6J40), CuNi1, CuNi2, CuNi6, CuNi8, CuNi10, CuNi14, CuNi19, CuNi23,CuNi30, CuNi34, CuNi44.

Size dimension range:
Wire: 0.1-10mm
Ribbons: 0.05*0.2-2.0*6.0mm 
Strip: 0.05*5.0-5.0*250mm 

Main grades and properties 

Type	Electrical resistivity (20degreeΩ mm²/m)	temperature coefficient of resistance (10^6/degree)	Dens ity g/mm²	Max. temperature (°c)	Melting point (°c)
CuNi1	0.03	<1000	8.9	/	1085
CuNi2	0.05	<1200	8.9	200	1090
CuNi6	0.10	<600	8.9	220	1095
CuNi8	0.12	<570	8.9	250	1097
CuNi10	0.15	<500	8.9	250	1100
CuNi14	0.20	<380	8.9	300	1115
CuNi19	0.25	<250	8.9	300	1135
CuNi23	0.30	<160	8.9	300	1150
CuNi30	0.35	<100	8.9	350	1170
CuNi34	0.40	-0	8.9	350	1180
CuNi40	0.48	±40	8.9	400	1280
CuNi44	0.49	<-6	8.9	400	1280

Mechanical Properties

Max Continuous Service Temp	400ºC
Resisivity at 20ºC	0.49±5%ohm mm2/m
Density	8.9 g/cm3
Thermal Conductivity	-6(Max)
Melting Point	1280ºC
Tensile Strength,N/mm2   Annealed,Soft	340~535 Mpa
Tensile Strength,N/mm3   Cold Rolled	680~1070 Mpa
Elongation(anneal)	25%(Min)
Elongation(cold rolled)	≥Min)2%(Min)
EMF vs Cu, μV/ºC (0~100ºC)	-43
Micrographic Structure	austenite
Magnetic Property	Non