Silica manganese is an alloy of Iron, Silicon & Manganese. It has
higher Silicon content in comparison to Ferro Manganese. Silicon
reduces the solubility of carbon in manganese alloys, so carbon
contents are inversely proportional to silicon content. It is a
more potent deoxidizer of steel compared to Ferro manganese.
Deoxidization with SiMn results in cleaner steel than using Ferro Silicon.