pretty basic maths, with just a tape measure I can work out that this cylinder in mild steel weighs about 14.7 kg, the volume of the bore is 1.69 litres, the volume of the steel is 1882.4 cm cubed. If its was made out of gold it would weigh 36.37 kg and if it was made out of uranium it would weigh 35.28 kg.

material densities...http://www.mcelwee.net/html/densities_of_various_materials.html