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Ferro Alloy

Ferroalloy, an alloy of iron (less than 50 percent) and one or more other metals, important as a source of various metallic elements in the production of alloy steels.

The principal ferroalloys are ferromanganese, ferrochromium, ferromolybdenum, ferrotitanium, ferrovanadium, ferrosilicon, ferroboron, and ferrophosphorus. These are brittle and unsuitable for direct use in fabricating products, but they are useful sources of these elements for the alloy steels. Ferroalloys usually have lower melting ranges than the pure elements and can be incorporated more readily in the molten steel. 

Ferroalloys are in fact used in all steels—e.g., plain carbon, stainless, alloy, electrical, tool, and so on.They are prepared from charges of the nonferrous metal ore, iron or iron ore, coke or coal, and flux by treatment at high temperature in submerged-arc electric furnaces. An aluminothermic reduction process is used for making ferrovanadium, ferrotitanium, and ferroniobium.

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