What Is Mild Steel Made From?

Mild steel, also known as low carbon steel, is made from iron, sulfur, phosphorus, manganese and carbon. This type of steel is widely used for machined parts, non-critical components in tool and die sets and for parts that require tight radius bending.

Mild steel is often used in applications such as mounts or spacers on heavy equipment or off-highway machinery. This type of steel is often used in manufacturing due to the ease with which it can be welded. The steel requires no pre- or post-weld heating in order to ensure the quality of the weld. In cases where the steel is bent at extreme angles, heating the material allows the stresses on the material to relax. Normalizing, tempering and forging are all part of the heat treatment process for mild steel.

Mild steel is often favored because of the ease with which it can be formed. The lower the carbon content of steel the more ductile the material is. The trade-off for material that can be bent more easily is that it cannot be made as strong through heat treatment. In contrast, high carbon steel can be made extremely strong, however this material is also extremely brittle and therefore difficult to form.