What is the unit weight of steel?

Steel weighs 7850 kilograms per cubic meter, or 489.8 pounds per cubic foot. Stainless steel weighs between 7480 and 8000 kilograms per cubic meter, depending on its exact composition. A 0.25-inch-thick steel plate weighs 10.2 pounds per square foot.

Steel is an alloy of iron and carbon. Steel is created by heating iron in the presence of oxygen. Iron is a soft, malleable metal. Adding 1.5 to 2 percent carbon creates steel, which is a stronger but less malleable metal. Stainless steel is steel with varying amounts of chromium added to prevent rust from forming. Cast iron is steel with a carbon content higher than 2 percent. It is not malleable but can be melted and cast in molds.