An alloy wire used at operating temperatures up to 1200°C (2200°F). Its chemical composition gives good oxidation resistance especially under conditions of frequent switching or wide temperature fluctuations.
80/20 Ni Cr Resistance Wire is also known as Nichrome / Nicrove V, Brightray C, Cronix 80, Nicrothal 80, Chromalloy, Chromel, and Gilphy 80.
| Element | Min | Max |
| C | – | 0.15 |
| Si | 0.50 | 2.00 |
| Mn | – | 1.00 |
| P | – | 0.02 |
| S | – | 0.015 |
| Cr | 19.00 | 21.00 |
| Ni | 75.00 | – |
| Al | – | 0.30 |
| Cu | – | 0.50 |
| Fe | – | 1.00 |
Density
8.31g/cm³ | 0.300 lb/in³
Melting Point
1200 °C 300 °C | 2550 °F
Coefficient of Expansion
12.5 µm/m °C (20 – 100°C) | 7.0 x 10-6 in/in °F (70 – 212°F)
Electrical Resistivity at 20°C
108 microhm • cm | 650 ohm. Circ. mil/ft
Maximum Operating Temperature
1200 °C 300 °C | 2200 °F 572 °F
Temperature-Resistance Factor (F) At:
| 20°C | 100°C | 200°C | 300°C | 400°C | 500°C | 600°C | 700°C | 800°C | 900°C | 1000°C | 1100°C | 1200°C |
| 68°F | 212°F | 392°F | 572°F | 752°F | 932°F | 1112°F | 1292°F | 1472°F | 1652°F | 1832°F | 2012°F | 2192°F |
| 1.00 | 1.006 | 1.015 | 1.028 | 1.045 | 1.065 | 1.068 | 1.057 | 1.051 | 1.052 | 1.062 | 1.071 | 1.080 |