Copper-clad aluminium (CCA)

Kanthal® copper-clad aluminium (CCA) wire is available with 10% or 15% copper cladding over an aluminium wire core. CCA offers the inherent characteristics of aluminium while the copper cladding provides greater conduction of current and the ease of soldering of copper. Kanthal® CCA wire is used for electrical contact material and conductors.

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Copper-clad aluminium
AlloyChemical compositionUltimate tensile strengthElectrical conductivity IACS 20°C (68°F)Electrical resistivityDensityCoefficient of thermal expansion
10%CCA 10% Copper by volume 82.7 MPa (12.0 ksi) 62.854 2.74 Ω cm 10-6 (16.5 Ω cir-mil/ft) 3.32g/cm
(0.12 lb/in3)
22.9 µm/m-°C (12.7 µin/in-°F)
15%CCA 15% Copper by volume 117 MPa (17.0 ksi) 64.416 2.67 Ω cm 10-6 (16.1 Ω cir-mil/ft) 3.63g/cm3 (0.131 lb/in3) 22.9 µm/m-°C (12.7 µin/in-°F)