Aluminum 2.65E-8 Brass 7.5E-8 Copper 1.68E-8 Gold 2.4E-8 Iron 9.71E-8 Manganin 4.82E-7 Mercury 9.8E-7 Platinum 1.06E-7 Silver 1.59E-8 Tungsten 5.6E-8 Zinc 5.5E-8