Copper-Nickel Alloy

• Copper-nickel alloy resistance wire has high electrical conductivity, which makes it excellent in situations where efficient energy transmission is required. The oxide film formed on the surface of copper-nickel alloys has good oxidation resistance, which can extend the service life of the heating element. Copper-nickel alloys are resistant to many chemicals, allowing them to maintain good performance in various environments.Copper-nickel alloys have good processing properties and can be made into various shapes of heating elements by various processing methods.The resistivity of copper-nickel alloys is low, so the resistance of the resistance wire can be reduced under the same length and cross-sectional area, thereby reducing the heating power and increasing the efficiency.These advantages make copper-nickel resistance wire an important material for heating elements and are widely used in the area of making heating cable, variable resistors, low voltage appliances, machine tool electric appliances, wound resistors etc. The most common alloys are CuNi2, CuNi6, CuNi10, CuNi23, CuNi30, CuNi44, 6J40, 6J11, 6J12, 6J8, 6J13, Monel 400, Monel 500 etc.

Main Properties and Characteristics of Copper-Nickel Low Resistance Electrothermal Alloy Material

Alloy Name Properties		NC005 CuNi2	NC010 CuNi6	MC012 CuMn3	NC015 CuNi10	NC025 CuNi19	NC030 CuNi23	NC035 CuNi30	NC040 CuNi34	NC050 CuNi44
Main Components (%)	Ni	2	6	-	10	19	23	30	34	44
	Mn	-	-	3	-	0.5	0.5	1	1	1
	Cu	Bal.	Bal.	Bal.	Bal.	Bal.	Bal.	Bal.	Bal.	Bal.
Maximum operating Temp.(℃)		200	220	200	250	300	300	350	350	400
Melting point (approx℃)		1090	1095	1050	1100	1135	1150	1170	1180	1280
Density (g/cm3)		8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9
Resistivity 20℃(μΩ.m)		0.05±10%	0.1±10%	0.12±10%	0.15±10%	0.25±5%	0.3±5%	0.35±5%	0.4±5%	0.50±5%
Tensile strength (Mpa)		≥220	≥250	≥290	≥290	≥340	≥350	≥400	≥400	≥420
Elongation (%,>Φ1.0)		≥25	≥25	≥25	≥25	≥25	≥25	≥25	≥25	≥25
TCR 10-5/℃ （20-600℃）		<120	<60	<38	<50	<25	<16	<10	0	<-6

Main Properties and Characteristics of Precision Resistance Alloys

Alloy Name Properties		6J40 Constantan	6J11 New Constantan	6J12 Manganin	6J8 F1 Manganin	6J13 F2 Manganin
Main Chemical Components (%)	Mn	1~2	10.5~12.5	11~13	8~10	11~13
	Ni	39~41	-	2~3	-	2~5
	Cu	Bal.	Bal.	Bal.	Bal.	Bal.
	other		Al：2.5~4.5 Fe：1.0~1.6		Si：1~2
Continuous operating temperature (℃)		5~500	5~500	5~45	10~80	10~80
Density (g/cm3)		8.88	8.0	8.44	8.7	8.4
Resistivity 20℃ (μΩ.m)		0.48±0.03	0.49±0.03	0.47±0.03	0.35±0.05	0.44±0.04
Elongation (%,Φ>0.5,L0=200mm)		≥15	≥15	≥15	≥15	≥15
TCR (α×10-6/℃)		-40~+40	-80~+80	-3~+20	-5~+10	0~+40
μv /℃(0～100℃) EMF vs Copper		45	2	1	2	2