CuNi44 Constantan Wire Copper Nickel Alloy Wire High Resistivity Low TCR Precision Resistance Wire for Resistor Potentiometer Thermocouple Compensation Cable
CuNi44, also known as Constantan, is a classic copper-nickel resistance alloy. It boasts stable electrical resistance, an extremely low temperature coefficient of resistance, as well as excellent corrosion resistance, ductility and solderability. Being non-magnetic, it suits various working conditions. It is widely used for precision resistors, potentiometers, thermocouple compensation wires, strain gauges and heating elements in electronic instruments and industrial equipment. It can be fabricated into wires, strips and other forms.
1. Chemical Composition
|
Ni |
44 |
|
Cu |
Bal |
|
Mn |
1.0 |
2. Technical Specifications
|
Parameter |
Specification |
|
Max continuous Operating Temperature(℃) |
400 |
|
Resisivity( μΩ/m,20℃) |
0.49 |
|
Density(g/m³) |
8.9 |
|
TCR(10−6/℃) |
＜-6 |
|
Tensile strength(N/m㎡) |
≥420 |
|
Melting point(℃) |
1280 |
|
Magnetic Property |
non |
3. Production Attributes
|
Product Form |
wire |
|
Diameter |
0.1-0.16mm |
|
Surface Finish |
Bright, Polished |
|
Packaging Type |
Coil, Bundle, Straight Rods |
|
Certification |
ISO9001, SGS, and so on |
|
Application Environment |
Chemical, Industrial,Home |
4. Applications
- Precision resistors and potentiometers
- Thermocouple compensation wires
- Strain gauges
- Industrial heating elements
- Electronic instruments and meters
- Electrical equipment and automation device
5.Key Features
- Stable electrical resistance performance
- Extremely low temperature coefficient of resistance
- Excellent corrosion resistance
- Good ductility and easy processing
- Fine solderability for convenient assembly
- Non-magnetic property
- Reliable thermoelectric property
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