Ferromolybdenum operates as a key component in iron with a, Molybdenum alloy molybdenum content of 60, 70% 1 This product represents 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 blended with oxide of iron and aluminium and is reduced in the an aluminothermic reaction to molybdenum and iron. The ferromolybdenum can be purified by electron beam melting or used as it stands. 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 d sseldorf, Germany.