Mild steel is manufactured in a similar way to other carbon steels. A common method is to combine iron ore and coal. Once the coal and iron ore have been mined from the earth, they are melted together in a blast furnace. After melting, the mixture is transferred to another furnace to burn off any impurities they may have, as well as making any other adjustments to the chemical composition of it. After this, the steel is allowed to solidify into a rectangular shape. This mild steel sheet is then usually reduced to the required size using a process known as hot rolling or cold drawing, although other methods are also available.