Ferro Silicon Manganese is the one of the main raw-materials used for steel maker, it has several grades according to the Mn. Ferro Silicon Manganese is the one of the main raw-materials used for steel maker, it has several grades according to the Mn. Silicon Manganese 6517Mn 65% Min., Si 17% Min., C 2% Max., P 0.2% Max., S 0.05% MaxSize: 10-50 Mm 90% Min or as the buyer's options Ferro Silicon ...