Specific Resistance Coefficients at 20°C – Comprehensive Material Reference
Specific resistance at 20°C:
Below is a comprehensive list of specific resistance values for common metals and alloys measured at 20°C. These coefficients are essential for accurate electrical design and simulation.
| Material | Element / Alloy | Ω‑cmil/ft | Ω‑cm×10⁻⁶ |
|---|---|---|---|
| Nichrome | Alloy | 675 | 112.2 |
| Nichrome V | Alloy | 650 | 108.1 |
| Manganin | Alloy | 290 | 48.21 |
| Constantan | Alloy | 272.97 | 45.38 |
| Steel* | Alloy | 100 | 16.62 |
| Platinum | Element | 63.16 | 10.5 |
| Iron | Element | 57.81 | 9.61 |
| Nickel | Element | 41.69 | 6.93 |
| Zinc | Element | 35.49 | 5.90 |
| Molybdenum | Element | 32.12 | 5.34 |
| Aluminum | Element | 15.94 | 2.650 |
| Gold | Element | 13.32 | 2.214 |
| Copper | Element | 10.09 | 1.678 |
| Silver | Element | 9.546 | 1.587 |
* Steel alloy: 99.5 % iron, 0.5 % carbon.
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