Ferro molybdenum is a ferro alloy that is generally obtained by the aluminothermic reduction of ferrosilicon and technical grade molybdic oxide. After the solidification of the metal, some milling and sievingoperations are carried out, thus obtaining the suitable particle size for addition in steel and cast iron.Ferro molybdenum is classified according to its molybdenum content. The most common categories arethose of femo, between 60%-70%.