Silico Manganese is a ferro-alloy mainly composed of Silicon and Manganese. It is used as a de-oxidising and alloying additive in the smelting of steel. Silico Manganese is a high value-added product used for manufacturing mild and special steels. It is manufactured and supplied in various shapes and form factors, from billets to fillers and allied reinforcements. 

Silicon Manganese is essential in making carbon and alloy steels to impart specific chemical and physical properties like flexibility, tensile strength, increased ductility, enhanced resistance, and reduced corrosion. Manganese is used in the process to increase strength and toughness. Silico Manganese finds usage in de-sulphurisation, de-oxidation, and refining of steel.

To summarize the above information, the combinations of Manganese and Silicon with Iron render the physical and chemical properties, optimizing steel's strength and durability.