The Essence of Materials for Engineers

APPENDIX B-3

List of the Values of Electrical Conductivity and Resistivity for Some Important Engineering Materials (at Room Temperature)

Material	Electrical conductivity (Ω-m)	Electrical resistivity (Ω-m)−1
Metals and Alloys
Al 1100 (pure, annealed)	3.44 × 107	2.9 × 10−8
Al 2024 (annealed)	2.94 × 107	3.4 × 10−8
Al 6061 (annealed)	2.70 × 107	3.7 × 10−8
Al 7075 (T6 age)	1.92 × 107	5.22 × 10−8
Al 354.0 (cast, T6 age)	2.26 × 107	4.42 × 10−8
Brass (70Cu-30Zn)	1.61 × 107	6.2 × 10−8
Bronze	6.95 × 106	14.4 × 10−8
Cast iron, gray	0.67–1.18 × 106	15.0–8.5 × 10−7
Cast iron, ductile	1.6–1.8 × 106	5.5–6.2 × 10−7
Copper (pure, ETP)	5.81 × 107	1.72 × 10−8
Copper-nickel (30% Ni)	2.67 × 106	37.5 × 10−8
Gold (commercially ...