When used for heating purposes and when the stability of the resistance value is not important, an alloy called ‘Nichrome’ is normally used. As it’s common name suggests, it is an alloy of 80% Nickel and 20% Chromium.
| Diameter mm | SWG | Ohms / metre | Approx metres on 50g reel |
| 2.03 | 14 | 0.337 | 1.7m |
| 1.62 | 16 | 0.526 | 2.7m |
| 1.22 | 18 | 0.934 | 4.7m |
| 0.91 | 20 | 1.661 | 8.5m |
| 0.71 | 22 | 2.745 | 14.1m |
| 0.56 | 24 | 4.441 | 22.7m |
| 0.46 | 26 | 6.645 | 34.0m |
| 0.38 | 28 | 9.817 | 50m |
| 0.32 | 30 | 13.987 | 71m |
| 0.27 | 32 | 18.486 | 94m |