Iron alloy is an alloy composed of one or two or more fused metallic or non-metallic elements and iron together. For example, silicon and iron Fe2Si ferrosilicon is formed, Fe5Si3, FeSi, FeSi2 silicide, etc., which are the main components of ferrosilicon, calcium silicon aluminum alloy, ferrosilicon and silicon mainly FeSi FeSi2 form, aluminosilicate calcium alloy prices, in particular FeSi more stable. Ferroalloys: not the same in different components of ferrosilicon melting points, such as 45% ferrosilicon melting point of 1260 ℃, high-silicon aluminum calcium alloy, 75% ferrosilicon was 1340 ℃. Ferromanganese manganese and iron alloy, which also contains carbon, silicon, phosphorus and other small amounts of other elements, according to their carbon content is different, ferromanganese into high-carbon ferromanganese, medium carbon ferromanganese and low-carbon ferromanganese. Manganese alloy containing a sufficient amount of silicon called silicon-manganese alloys.