Electrical Conductivity of Common Copper Alloys
The electrical conductivity of copper alloys varies depending on the alloying elements and their concentrations. In general, alloying elements reduce the conductivity of copper. The amount of reduction depends on the type and amount of alloying element.
The following tables provide a curated list of electrical conductivity values for different copper alloys in both International Annealed Copper Standard (%IACS) and Siemens per meter (S/m) units.
Unless stated otherwise, all values are taken at standard room temperature (approximately 20°C or 68°F) and 1 atmospheric (atm) pressure. (1 atm = 101,325 Pa)
| Oxygen-free electronic copper (C10100) | 101 | 5.858 |
| Oxygen-free copper (C10200) | 101 | 5.858 |
| Oxygen-free low-phosphorus copper (C10800) | 92 | 5.336 |
| Electrolytic tough pitch copper (C11000) | 100 | 5.8 |
| Phosphorus deoxidized arsenical copper (C14200) | 45 | 2.61 |
| Beryllium copper (C17200) | 22 | 1.276 |
| Beryllium copper (C17000) | 22 | 1.276 |
| Cadmium copper (C16200) | 90 | SIval |
| Chromium copper (C18200) | 80 | SIval |
| Cobalt beryllium copper (C17500) | 45 | 2.61 |
| Lead copper (C18700) | 96 | 5.568 |
| Silver-bearing copper (C11300) | 100 | 5.8 |
| Sulfur copper (C14700) | 95 | 5.51 |
| Tellurium copper (C14500) | 93 | 5.394 |
| Zirconium copper (C15000) | 90 | SIval |
| Admiralty brass (C44300) | 25 | 1.45 |
| Aluminum brass (C68700) | 23 | 1.334 |
| Cartridge brass (C26000) | 28 | 1.624 |
| Free-cutting brass (C36000) | 26 | 1.508 |
| Gilding metal (C21000) | 56 | 3.248 |
| Architectural bronze (C38500) | 28 | 1.624 |
| Hot stamping brass (C37700) | 27 | 1.566 |
| Low brass (C24000) | 32 | 1.856 |
| Muntz metal (C28000) | 28 | 1.624 |
| Naval brass (C46400) | 26 | 1.508 |
| Red brass (C23000) | 32 | 1.856 |
| Yellow brass (C26800) | 27 | 1.566 |
| Phosphor bronze (C51100) | 20 | 1.16 |
| Phosphor bronze A (C51000) | 15 | 0.87 |
| Phosphor bronze C (C52100) | 13 | 0.754 |
| Phosphor bronze D (C52400) | 11 | 0.638 |
| Silicon bronze A (C65500) | 7 | 0.406 |
| Silicon bronze B (C65100) | 12 | 0.696 |
| Aluminum bronze D (C61400) | 14 | 0.812 |
| Aluminum bronze (C60800) | 17 | 0.986 |
| Aluminum bronze (C63000) | 7 | 0.406 |
| Copper nickel (C70400) | 14 | 0.812 |
| Copper nickel (C70600) | 9 | 0.522 |
| Copper nickel (C71500) | 4.6 | 0.267 |
| Nickel silver 10% (C74500) | 9 | 0.522 |
| Nickel silver 12% (C75200) | 6 | 0.348 |
| Nickel silver 15% (C74500) | 9 | 0.522 |
| Nickel silver 18% (C75200) | 6 | 0.348 |
| Nickel silver 25% (C74500) | 9 | 0.522 |
| Admiralty gun metal (C90500) | 11 | 0.638 |
| Aluminum bronze (C95200) | 11 | 0.638 |
| Aluminum bronze (C95500) | 8 | 0.464 |
| Beryllium copper (C81300) | 60 | 3.48 |
| Beryllium copper (C81400) | 60 | 3.48 |
| Beryllium copper 20C (C82500) | 20 | 1.16 |
| Cast copper (C81100) | 92 | 5.336 |
| Chromium copper (C81500) | 82 | 4.756 |
| High-tensile brass (C86500) | 22 | 1.276 |
| Hydraulic bronze (C83800) | 15 | 0.87 |
| Leaded gunmetal (C83600) | 15 | 0.87 |
| Silicon brass (C87500) | 6.7 | 0.389 |
| Tin bronze (C90700) | 10 | 0.58 |
The electrical conductivity of copper alloys can vary depending on the specific alloy composition, processing, and temperature.
Related Tables
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) CRC Materials Science and Engineering Handbook. United States: CRC Press, 2000.