Ferroalloy classification: single iron alloy. Only an alloy containing an alloying element is called a single alloy. The main varieties are ferrosilicon, ferromanganese, ferrochrome, molybdenum iron, titanium-iron, tungsten, iron, industrial silicon, boron, iron, vanadium, iron, manganese metal and so on. Press ferroalloy carbon content classification. There are high-carbon, medium carbon, low-carbon, low carbon, ultrafine carbon and other varieties. Iron alloy is an alloy composed of one or two or more fused metallic or non-metallic elements and iron together. For example, calcium, barium aluminosilicate Hubei new, silicon and ferrosilicon is Fe2Si iron formation, Fe5Si3, FeSi, FeSi2 and other silicide Jilin new barium, calcium aluminosilicate, which are the main components of ferrosilicon, ferrosilicon silicon mainly FeSi and FeSi2 form, in particular FeSi more stable.