Question: how much does 1 cubic mm of steel weigh?
Answer: Density of steel (material) Steel weighs 7.9 gram per cubic centimeter or 7 900 kilogram per cubic meter, i.e. density of steel is equal to 7 900 kg/m³. In Imperial or US customary measurement system, the density is equal to 493.18 pound per cubic foot [lb/ft³], or 4.6 ounce per cubic inch [oz/inch³] .