Iron alloy body element generally higher melting point, or it is difficult to make a reduction of oxides, pure metals, such as iron and together more easily smelting reduction. In iron and steel smelting using iron alloy containing iron, which not only harmless, but because of the more favorable fusible in molten steel. Therefore, in the process of steelmaking deoxidization and alloying, mostly iron alloy form to join. Iron alloy is generally very brittle, not as a metal material. Iron alloy iron and one or several elements of the intermediate alloy, mainly used for steel smelting. In the steel industry in general has put all steel used in intermediate alloy containing iron, regardless of whether or not, are known as the ” iron alloy “.