Ferromolybdenum is an important iron molybdenum alloy, with the molybdenum content of 60-70%. It is the main source for molybdenum alloying of HSLA steel. The molybdenum is mined and is subsequently transformed into the molybdenum (VI) oxide MoO3. This oxide is mixed with iron oxide and aluminum and is reduced in the aluminothermic reaction to molybdenum and iron. The ferromolybdenum can be purified by electron beam melting or used as it is. For alloying with steel the ferromolybdenum is added to molten steel before casting. Among the biggest suppliers of Ferromolybdenum in Europe is the German trading house Grondmet in Düsseldorf, Germany.
The main usage of ferromolybdenum is to make alloy steel. Ferromolybdenum is used widely in making a series of steel such as constructional steel, spring steel, bearing steel, tool steel, acid resistance stainless steel, heat-resisting steel and alnico.


