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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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