Note: Ferromanganese is an alloy of manganese and iron. Due to the large affinity of manganese with oxygen and sulfur, ferromanganese is a deoxidizer and desulfurizer for molten steel in steelmaking. Manganese can refine the grain of steel and improve the quenching depth of steel, so ferromanganese is also used as an alloying element additive. Main categories: high carbon ferromanganese (7% carbon), medium carbon ferromanganese (1.0-1.5% carbon), low carbon ferromanganese (0.5% carbon), metallic manganese, specular iron and silicon manganese alloy.