Common trade names: NiCr 80/20, Ni80Cr20, Nichrome 80, Chromel A, N8, Nikrothal 80, Resistohm 80, Cronix 80, Nichrome V, HAI-NiCr 80, X20H80.
NiCr 80 20 (Werkstoff Nr 2.4869) is an Nickel-Chromium alloy for use at temperatures up to 1200°C. Heat resistant alloy applied in oxidizing atmospheres such as nitrogen, ammonia, unstable atmospheres containing sulfur and sulfur compounds. NiCr 80/20 has higher heat-resisting characteristic than Iron-aluminum alloys.
Chemical composition
| Nickel Ni 77.0-80.0% | Chromium Cr 19.0-21.0% | Iron Fe 1.0% | Silicon Si 0.5-1.5% | Manganese Mn 1.0% | Copper Cu 0.5% | Carbon C 0.1% | Cupper Cu 0.4% | Aluminium Al 0.2% |
Physical properties
| Density at Room°C |
Electrical Resistivity at 20°C |
Melting Point °C |
Max Continuous Operating Temperature in Air °C |
Magnetic Properties |
| 8.3 g/cm3 | 1.08(1.12)* microhm-m | 1400 | 1200 | The Material is Non-Magnetic |
| *Electrical Resistivity 1.08 Ω mm2/m corresponds to an Oxidized Annealed condition Electrical Resistivity 1.12 Ω mm2/m corresponds to a Bright Annealed condition |
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Mechanical properties
| NiCr 80 20 wire, mm |
Yield Strength Rp0.2 (MPa) |
Tensile Strength Rm (MPa) |
Elongation A % |
Hardness Hv |
| 1.0 | 420 | 810 | 30 | 180 |
| 4.0 | 300 | 725 | 30 | 160 |
Product forms
| Product | Size (mm) | Condition of Supply |
| Wire | 0.2 – 12.0 | Bright Annealed Oxidized |
| Bar | 5.0 – 60.0 | Hot Finished Cold Finished Peeled Bright Turned Bright Annealed |
| Strip | Thickness 2.5 – 5.0 Width 20 – 100 |
Cold Finished Bright Annealed |
| Ribbon | Thickness 0.2 – 1.0 Width 2.0 – 4.5 |
Bright Annealed Flat Rolled |
| Stranded Wire | 2.5 – 3.0 | Hard Annealed |
Application
NiCr 80 20 is used for electric heating elements in home appliances and industrial furnaces. Typical applications are flat irons, ironing machines, water heaters, plastic moulding dies, soldering irons, metal sheathed tubular elements and cartridge elements. Due to extremely good adhesion properties of the surface oxide, NiCr 80 20 offers superior service life compared to other Nickel-Chromium alloys.
- Electrical parts and electronic components.
- Electric heating elements (home & industrial use).
- Industrial furnaces up to 1200 °C.
- Heating cables, mats and cords.