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Enamelled Resistance Heating Wire Nickel 3070 Ohmalloy Chrome 70/30 20AWG 24AWG 26AWG28AWG
Enamelled Ni70Cr30 is a nickel-chromium alloy (NiCr alloy) characterized byHigh resistivity, good oxidation resistance,very good form stability,good ductility and excellent weldability. It is suitable for use at temperatures up to 1250°C.
Products Details
1). Chemical composition(%)
| C | P | S | Mn | Si | Cr | Ni | Al | Fe | Other |
| 0.05 | 0.02 | 0.15 | 0.60 | 0.75~1.6 | 28.0~31.0 | Bal. | Max0.5 | Max1.0 | _ |
2).Typical Mechanical properties(1.0mm)
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 430 | 820 | 30 |
3).Typical Physical properties
Density (g/cm3) | 8.2 |
Electrical resistivity at 20ºC(Ωmm2/m) | 1.18 |
| Conductivity coefficient at 20ºC (WmK) | 14 |
4).Coefficient of Thermal Expansion
| Temperyure | Coefficient of Thermal Expansion x10-6/ºC |
20 ºC- 1000ºC | 17 |
5).Specific Heat Capacity
Temperature | 20ºC |
J/gK | 0.46 |
Melting point (ºC) | 1380 |
Max continuous operating temperature in air (ºC) | 1250 |
Magnetic properties | non-magnetic |
6).Temperature Factors for Electrical Resistivity
| 20ºC | 100ºC | 200ºC | 300ºC | 400ºC | 500ºC | 600ºC |
| 1 | 1.007 | 1.016 | 1.028 | 1.038 | 1.044 | 1.036 |
| 700ºC | 800ºC | 900ºC | 1000ºC | 1100ºC | 1200ºC | 1300ºC |
| 1.03 | 1.028 | 1.029 | 1.033 | 1.037 | 1.043 | - |
Production Procedure
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