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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 6517
Mn 65% Min., Si 17% Min., C 2% Max., P 0.2% Max., S 0.05% Max
Size: 10-50 Mm 90% Min or as the buyer's options
Ferro Silicon Manganese 65