Density of various metals (g/cc) Osmium 22.61 Iridium 22.56 Platinum 21.46 Rhenium 21.02 Gold 19.84 Tungsten 19.25 Uranium 18.95 Tantalum 16.65 Mercury 13.53 Hafnium 13.31 Rhodium 12.41 Palladium 12.02 Thallium 11.85 Technetium 11.5 Lead 11.3 Silver 10.5 Molybdenum 10.07 Lutetium 9.84 Bismuth 9.81 Thulium 9.32 Erbium 9.066 Copper 8.96 Nickel 8.912 Cobalt 8.86 Holmium 8.795 several others and then Iron 7.87. Steels vary in density but they are all about that.