Mild steel is a type of steel alloy, which contains a high percentage of carbon as a major alloying agent. Alloys are simple a mixture of one or more metals with non-metals, designed to give specific improved properties over the parent base metal. Mild steel is the type of steel, which is used in the majority of all steel internal and external. Mild steel may also be thought of as steel which is not stainless. Mild steel and low carbon steel mainly differ from stainless steels in having a much lower percentage of chromium.