specific gravity chart metal or alloy density actinium 10.070 admiralty brass 8.525 aluminum 2.712 aluminum – melted 2.560 – 2.640 aluminum – 1100 2.720
how to calculate the specific gravity of a coin  [eng] manual why to know the specific gravity of a coin it is useful for the determination of its gold or silver content this is an useful information to discover some fakes or to study the composition of certain coins.
the specific gravity of all other materials are compared to water as a fraction heavier or fraction lighter density no matter how small or large the fraction is. for example beryllium has a specific gravity (sg) of 1.84 (1840 kg/m³). as specific gravity is just a comparison it can be applied across any units.
specific gravity of gold can easily be calculated by using a cup of water a string a tripod and a scale. all you need to do to calculate the specific gravity is submerge your gold or silver or any other precious metal item in water and do 1 simple calculation.
the coin is weighed in air then weighed in water and a ratio is calculated. each metal has an exact specific gravity. relative density or specific gravity is the ratio of the density (mass
how to determine specific gravities of alloys. find the reciprocal of the specific gravity of each metal in the alloy. this is done by dividing 1 by the specific gravity. for example the specific gravity of silver is 10.49 and the reciprocal is 1 divided by 10.49 or 0.094966.