NiCr 70/30
Resistance alloys and resistance heating alloys
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NiChrome 70 (NiCr 70/30) is an austenitic nickel-chromium alloy for use at temperatures up to 1100°C. This Ni-Cr alloy has high resistivity and good oxidation resistance.
| C % | Si % | Mn % | Cr % | Fe % | Ni% | |
|---|---|---|---|---|---|---|
| Min | – | 0.75 | – | 28.0 | – | Bal. |
| Max | 0.08 | 1.60 | 0.60 | 31.0 | 1.0 |
|
Density g/cm3
|
8.10 |
|
Electrical resistivity at 20°C Ω mm2/m
|
1.18 |
|
Melting point °C
|
1380 |
|
Max continuous operating temperature in air °C
|
1250 |
|
Specific heat capacity kJ kg-1 K-1
|
0.461 |
|
Thermal conductivity
|
12.5 |
|
Coefficient of thermal expansion 20-1000 °C 10-6/K |
17.0 |
|
Magnetic property
|
non-magnetic |
| °C | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 | 1100 | 1200 |
| Ct | 1.007 | 1.016 | 1.028 | 1.038 | 1.044 | 1.036 | 1.030 | 1.028 | 1.029 | 1.033 | 1.037 | 1.043 |
| Wire | Tensile strength | Elongation |
| Ø | Rm | A |
| mm | MPa | % |
| 3 | 650 | 20 |