Ferromanganese, a ferroalloy with high content of manganese, is made by heating a mixture of the oxides MnO2 and Fe2O3, with carbon, usually as coal and coke, in either a blast furnace or an electric arc furnace-type system, called a submerged arc furnace. The oxides undergo carbothermal reduction in the furnaces, producing the ferromanganese. Ferromanganese is used as a deoxidizer for steel.
Henry Bessemer invented the use of ferromanganese as a method of introducing manganese in controlled proportions during the production of steel. The advantage of combining powdered iron oxide and manganese oxide together is the lower melting point of the combined alloy co***red to pure manganese oxide.
A North American standard specification is ASTM A99. The ten grades covered under this specification includes;Standard ferromanganeseMedium-carbon ferromanganeseLow-carbon ferromanganese
Standard Ferromanganese Specifications
Material Description: Standard Ferromanganese (H.C. FeMn)
Chemistry: Mn 74.0-82.0%
C 7.5% max.
Si 1.2% max.
P 0.35% max.
S 0.05% max.
Size: 3" x 1" 3/8" x 12 Mesh
4" x 1" 3/8" x Down
6" x 4" 2" x 1/2"
Customized sizing available upon request.
Bulk Density: 260 lb./cu. ft.
Apparent Density: 7.2 gm/cubic centimeter
Approximate Melting Range: 2310 ¡ãF Liquidus2100 ¡ãF Solidus
Application: In cast iron, ferromanganese is used mainly to counteract the bad effects of sulfur. In steel, manganese acts as a deoxidizer and combines with sulfur, thereby improving the hot-working properties of the steel. Also improves the strength, toughness.
Country of Origin: South Africa, USA
Warehouse(s): Birmingham, ALChicago, ILEast Liverpool, OHMilwaukee, WI
HC Ferro Manganese
Mn 70-75% & 75-80%
C 7.5% Max.
Si 1.50% Max.
P 0.35 Max.
S 0.03% Max.
Size 10-50mm or as required by end user.
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