September 9, 2016

Silicon Manganese (SiMn)


Silicon manganese (SiMn) also known as silicomanganese, a ferroalloy with high contents of manganese and silicon, is made by heating a mixture of the oxides manganese oxide (MnO2), silicon dioxide (SiO2), and iron oxide (Fe2O3), with carbon in a furnace. They undergo a thermal decomposition reaction. It is used as a deoxidizer and an alloying element in steel.

Silicon increases the strength without a serious loss of ductility. It also adds scale resistance. These steels are generally heat treated to specific properties.

The standard grade silicon manganese contains 14.0% to 16.0% of silicon, 60% to 65% of manganese and 2% of carbon.

Vulcan Alloys currently trades in multiple grades of SiMn

Chemical Specification SiMn Grade 1 SiMn Grade 2
Manganese (Mn) 60.0% min 65.0% min
Silicon (Si) 14.0% max 16.0% min
Carbon (C) 2.50% max 2.50% max
Phosphorus (P) 0.35% max 0.30% max
Sulphur (S) 0.05% max 0.05% max
Size Lumps / Powder Lumps / Powder
Packaging 50 Kg HDPE bags / Jumbo bags 50 Kg HDPE bags / Jumbo bags