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.