| Metal | Relative conductivity | Electrical resistivity at 20˚C (Ω·m, 10−8) | Temperature coefficient of resistance (per ˚C) |
| Copper | 100 | 1.724 | 0.0039 |
| Aluminum | 61 | 2.826 | 0.0040 |
| Steel | 12 | 13.80 | 0.0045 |