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CuNi23 Resistance low temperature coefficient copper nickel binary alloy for heating cable of automobile heating cushion
Introduction
CuNi23 resistance alloy is one of copper nickel binary alloys,
having low temperature coefficient of resistance. It is applied to
make rheostat, shunt, controller and other low voltage electrical
components with a maximum operating temperature of 300°C. Due to
its good heat coefficient, this alloy is widely used in low
temperature heating cable of automobile heating cushion, railway
snow melting, etc.
CuNi23Mn is very malleable and has a good resistance to corrosion until temperatures of 400°C. Ideal applications areas are all types of resistances used at low temperature.
CuNi23Mn is typically used in heating cables, fuses, resistors and various types of controllers.
Physical Data
Density 8.9 g/cm3
Specific Heat 0.37(J/kg 20°C)
Electrical Resistivity 0.03×10-6ohm.m
Melting Point 1150°C
Maximum Operating Temperature 400°C
Coefficient of linear expansion (coeff 10-6/°C) 15.7 from 20 to 1000°C
Typical Mechanical Properties
Mechanical Properties CuNi23
Tensile Strength 350 Mpa
Elongation 25%
Main Mechanical Properties:
| Cu | CuNi2 | CuNi6 | CuNi10 | CuNi23Mn | CuNi44 | ||
| Tensile strength | [N/mm²] | 220-300 | 260-360 | 270-370 | 300-390 | 500-550 | 560-680 |
| Yield strength at 1% elongation | [N/mm²] | 120-200 | 140-240 | 160-220 | 140-250 | 200-330 | 400-500 |
| Bending proof performance | [%] | 100 | 160 | 760 | |||
| Resistance (IACS) | [%] | 101 | 34 | 17 | 12 | 6 | 3 |
| Conductivity | [S*m/mm²] | 58.5 | 20.0 | 10.0 | 6.7 | 3.33 | 2.0 |
| Resistivity | [Ohm*mm²/m] | 0.0171 | 0.05 | 0.10 | 0.1493 | 0.30 | 0.50 |
| Thermal coefficient of resistance | [1E-6/K] | 3900-4300 | 1100-1600 | 500-900 | 350-400 | 150-200 | -80 - +40 |
| Solderability | [-] | good | good | good | good | good | no conventional soldering |
main property type | Cuni1 | CuNI2 | CuNI6 | CuNi8 | CuNI10 | CuNi14 | CuNi19 | CuNi23 | CuNi30 | CuNi34 | CuNI44 | ||
main chemical composition | Ni | 1 | 2 | 6 | 8 | 10 | 14.2 | 19 | 23 | 30 | 34 | 44 | |
| MN | / | / | / | / | / | 0.3 | 0.5 | 0.5 | 1.0 | 1.0 | 1.0 | ||
| CU | rest | rest | rest | rest | rest | rest | rest | rest | rest | rest | rest | ||
max working temperature | / | 200 | 220 | 250 | 250 | 300 | 300 | 300 | 350 | 350 | 400 | ||
density g/cm3 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | ||
resistivity at 20 °c | 0.03 ± 10% | 0.05± 10% | 0.10± 10% | 0.12± 10% | 0.15± 10% | 0.20± 5% | 0.25± 5% | 0.30± 5% | 0.35± 5% | 0.40± 5% | 0.49± 5% | ||
temperature coefficient of resistance | <100 | <120 | <60 | <57 | <50 | <38 | <25 | <16 | <10 | -0 | <-6 | ||
tensile strength mpa | >210 | >220 | >250 | >270 | >290 | >310 | >340 | >350 | >400 | >400 | >420 | ||
| elongation | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 | ||
melting point °c | 1085 | 1090 | 1095 | 1097 | 1100 | 1115 | 1135 | 1150 | 1170 | 1180 | 1280 | ||
coefficient of conductivity | 145 | 130 | 92 | 75 | 59 | 48 | 38 | 33 | 27 | 25 | 23 |
