Silico Manganese (SiMn)

Silico Manganese is used as a deoxidizer and an alloying element in steel.

The standard grade Ferro Silico Manganese contains 14 to 16% of silicon, 65 to 68% of manganese and 250% of carbon. Special grades with up to 30% Si are used in the manufacture of stainless steel.

Ferro Silico Manganese can be used as a substitute for Ferro Silicon and Ferro Manganese when added to make different types of steel.

Both silicon and manganese have an important influence on the properties of steel, depending on the amount added and the combined effect with other alloying elements. Silicon and manganese have a strong affinity for oxygen, and will act as deoxidizers. Deoxidation with SiMn results in cleaner steel, as the liquid manganese silicate formed coagulates and separates easier from the melt, compared to solid SiO2 formed during FeSi deoxidation. Use of Ferro Silico Manganese adds less phosphorus, carbon, and nitrogen to steel compared to standard FeSi 75 plus HC FeMn.