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CuNi30 / CuNi34 Copper Based Alloys , Copper Nickel Wire For Low Voltage Apparatus
OhmAlloy35(Resistance heating wire and resistance wire)
(Common Name:CuNi30,NC35.Cu70Ni30)
OhmAlloy35 is a copper-nickel alloy (Cu70Ni30 alloy) with low resistivity for use at temperatures up to 350°C.
OhmAlloy35 is kind of low resistance heating alloy.It is one of the key materials of the low-voltage electrical products. It is widely used in low-voltage circuit breaker, electric blankets.thermal overload relay, and other low-voltage electrical product.
OhmAlloy35 is typically used for low-temperature applications such as heating cables.
Normal composition%
| Nickel | 30 | Manganese | 0.5 |
| Copper | Bal. |
Typical Mechanical properties(1.0mm)
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 200 | 400 | 25 |
Typical Physical properties
| Density (g/cm3) | 8.9 |
| Electrical resistivity at 20℃ (Ωmm2/m) | 0.35 |
| Temperature factor of resistivity(20℃~600℃)X10-5/℃ | <10 |
| Conductivity coefficient at 20℃ (WmK) | 27 |
| EMF vs Cu(μV/℃ )(0~100℃ ) | -37 |
| Coefficient of thermal expansion | |
| Temperature | Thermal Expansion x10-6/K |
| 20 ℃- 400℃ | 17 |
| Specific heat capacity | |
| Temperature | 20℃ |
| J/gK | 0.390 |
| Melting point (℃) | 1170 |
| Max continuous operating temperature in air (℃) | 350 |
| Magnetic properties | non-magnetic |
Corrosion resistance performance
| Alloys | Working In atmosphere at 20℃ | Working at max temperature 200℃ | |||||
| Air and oxygen contain gases | gases with Nitrogen | gases with sulfur oxidability | gases with sulfur reductibility | carburization | |||
| OhmAlloy35 | good | good | good | good | bad | good | |
Style of supply
| Alloys Name | Type | Dimension | ||
| OhmAlloy35W | Wire | D=0.06mm~8mm | ||
| OhmAlloy35R | Ribbon | W=0.4~40 | T=0.05~2.9mm | |
| OhmAlloy35S | Strip | W=8~200mm | T=0.1~3.0 | |
| OhmAlloy35F | Foil | W=6~120mm | T=0.005~0.1 | |
| OhmAlloy35B | Bar | Dia=8~100mm | L=50~1000 | |
CuNi series:
| Type | Electrical Resistivity (20℃Ωmm²/m) | Temperature Coefficient of Resistance(10-6/℃) | Density(g/m³) | Max. Temperature(℃) | Metlting Point(℃) |
| 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 |
