Ferro Manganese is a ferroalloy with a high manganese content. High-carbon ferromanganese can contain as much as 80% Mn by weight. It is produced by heating a mixture of the oxides MnO2 and Fe2O3 with carbon (usually coal and coke) in either a blast furnace or an electric arc furnace-type system, known as a submerged arc furnace. The oxides undergo carbothermal reduction in the furnaces, resulting in the production of ferromanganese. Ferromanganese is used as a deoxidizer for steel.

Standard ferromanganese, also referred to as high-carbon ferromanganese, is one of the manganese ferroalloys produced directly from manganese ores. The manganese content ranges from 65% to 82%, while the carbon content ranges from 0.4% to 7.5%. It is produced using either a blast furnace or a submerged arc furnace.