Ni30Cr20 is an austenitic nickel-chromium alloy suitable for temperature applications up to 1100°C. This alloy is characterized by high resistivity, good oxidation resistance, good ductility after use and excellent weldability. Ni35Cr20 is used for a wide range of electric heating elements in domestic appliances.
Typical applications: hot plates, heavy-duty rheostats, storage heaters, convection heaters, fan heaters, heating cables, electric blankets and pads, car seats, resistors, etc.
Common Name: OhmAlloy104B, Ni30Cr20,Nikrothal 30, N3, HAI-NiCr 30, Resistohm 30,30-20 Ni-Cr,Nikrothal 3
Ni30Cr20 Nickel-Chromium Nickel alloy resistance heating flat wire.
- Nickel-chromium alloy performance tables
| Performance material | Cr10Ni90 | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 |
| Composition | Ni | 90 | Rest | Rest | 55.0～61.0 | 34.0～37.0 | 30.0～34.0 |
| Cr | 10 | 20.0～23.0 | 28.0～31.0 | 15.0～18.0 | 18.0～21.0 | 18.0～21.0 |
| Fe | | ≤1.0 | ≤1.0 | Rest | Rest | Rest |
| Maximum temperature℃ | 1300 | 1200 | 1250 | 1150 | 1100 | 1100 |
| Meltiing point ℃ | 1400 | 1400 | 1380 | 1390 | 1390 | 1390 |
| Density g/cm3 | 8.7 | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 |
| Resistivity | | 1.09±0.05 | 1.18±0.05 | 1.12±0.05 | 1.00±0.05 | 1.04±0.05 |
| μΩ·m,20℃ |
| Elongation at rupture | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 |
| Specific heat | | 0.44 | 0.461 | 0.494 | 0.5 | 0.5 |
| J/g.℃ |
| Thermal conductivity | | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 |
| KJ/m.h℃ |
| Coefficient of lines expansion | | 18 | 17 | 17 | 19 | 19 |
| a×10-6/ |
| (20～1000℃) |
| Micrographic structure | | Austenite | Austenite | Austenite | Austenite | Austenite |
| Magnetic properties | | Nonmagnetic | Nonmagnetic | Nonmagnetic | Weak magnetic | Weak magnetic |
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