Ferromanganese (FeMn) is a kind of Ferroalloy with more manganese or in other words, it contains at least 80% Manganese by weight. Chemical composition of Ferromanganese: MNO2 + Fe2O3 Fero Invest LTD is trading with different types of Ferromanganese. Standard ferromanganese Medium-carbon ferromanganese Low-carbon ferromanganese Order Ferromanganese now!