Mild steel is a low-carbon steel with a density of 0.28 pounds/inch^3, based on the American Iron and Steel Institute data sheet. Mild steel was originally manufactured in an effort to reduce steel production costs by converting pig iron into usable steel.
The amount of carbon mixed with iron helps determine the properties of steel. Steel is stronger and less brittle than iron products, such as cast iron or wrought iron. There are more than 3,500 grades of steel, all with varying chemical and physical make-ups. Henry Bessemer created the process by which modern-day steel is produced. The Bessemer Process has been the basis for ongoing technological advances in steel.