Product Main

Specifications

We are the only manufacturing enterprise which gathers electrical heating alloy wire & strip and heating cable  in China .
 
Those are alloys of chemical composition copper + nickel with addition of manganese with a low resistivity (from 231.5 to 23.6 Ohm. Mm2/ft).

The most known, CuNi 44 (also called Constantan) presents the advantage of a very low temperature coefficient.

China Grade from chengxin alloy: CuNi1, CuNi2, CuNi6, CuNi8, CuNi10,CuNi14, CuNi19, CuNi22,CuNi23, CuNi30, CuNi34,CuNi40, CuNi44
 
 
Chemical Composition and Main Property of Cu-Ni Low Resistance Alloy
 
Properties\Grade
 
CuNi1
 
CuNi2
 
CuNi6
 
CuNi8
 
CuMn3
 
CuNi10
 
Main Chemical Composition
 
Ni
 
1
 
2
 
6
 
8
 
_
 
10
 
Mn
 
_
 
_
 
_
 
_
 
3
 
_
 
Cu
 
Bal
 
Bal
 
Bal
 
Bal
 
Bal
 
Bal
 
Max Continuous Service Temperature(oC)
 
200
 
200
 
200
 
250
 
200
 
250
 
Resisivity at 20oC (Ωmm2/m)
 
0.03
 
0.05
 
0.10
 
0.12
 
0.12
 
0.15
 
Density(g/cm3)
 
8.9
 
8.9
 
8.9
 
8.9
 
8.8
 
8.9
 
Thermal Conductivity(α×10-6/oC)
 
<100
 
<120
 
<60
 
<57
 
<38
 
<50
 
Tensile Strength(Mpa)
 
≥210
 
≥220
 
≥250
 
≥270
 
≥290
 
≥290
 
EMF vs Cu(μV/oC)(0~100oC)
 
-8
 
-12
 
-12
 
-22
 
_
 
-25
 
Approximate Melting Point( oC)
 
1085
 
1090
 
1095
 
1097
 
1050
 
1100
 
Micrographic Structure
 
austenite
 
austenite
 
austenite
 
austenite
 
austenite
 
austenite
 
Magnetic Property
 
non
 
non
 
non
 
non
 
non
 
non
 
 
 
Properties\Grade
 
CuNi14
 
CuNi19
 
CuNi23
 
CuNi30
 
CuNi34
 
CuNi44
 
Main Chemical Composition
 
Ni
 
14
 
19
 
23
 
30
 
34
 
44
 
Mn
 
0.3
 
0.5
 
0.5
 
1.0
 
1.0
 
1.0
 
Cu
 
Bal
 
Bal
 
Bal
 
Bal
 
Bal
 
Bal
 
Max Continuous Service Temperature(oC)
 
300
 
300
 
300
 
350
 
350
 
400
 
Resisivity at 20oC (Ωmm2/m)
 
0.20
 
0.25
 
0.30
 
0.35
 
0.40
 
0.49
 
Density(g/cm3)
 
8.9
 
8.9
 
8.9
 
8.9
 
8.9
 
8.9
 
Thermal Conductivity(α×10-6/oC)
 
<30
 
<25
 
<16
 
<10
 
<0
 
<-6
 
Tensile Strength(Mpa)
 
≥310
 
≥340
 
≥350
 
≥400
 
≥400
 
≥420
 
EMF vs Cu(μV/oC)(0~100oC)
 
-28
 
-32
 
-34
 
-37
 
-39
 
-43
 
Approximate Melting Point( oC)
 
1115
 
1135
 
1150
 
1170
 
1180
 
1280
 
Micrographic Structure
 
austenite
 
austenite
 
austenite
 
austenite
 
austenite
 
austenite
 
Magnetic Property
 
non
 
non
 
non
 
non
 
non
 
non
 

Packing: Spool, carton, wooden case or pallet: Coil, waterproof paper 
 
Jingyin chengxin alloy material co,.ltd is specialized in producing high / low resistance electric heating alloy in the form of wire,strip,bar,coil, including Ni-Cr-Fe, Ni-Cr,Cu-Ni,Manganin,Pure Nickel,Kama,Thermistor & Thermocouple compensation alloy wire .
 
Top quality and available price