Silico Manganese- SIZE (MM) 10-150 (May be resized to suit customers need) Si % 14 Min Mn % 60 Min C % 2.50 Max P % 0.25 Max Undersize % 5 Oversize % 5 FERRO MANGANESE â?? SIZE (MM) 10-150 (May be resized to suit customers need) Si % 2 Max Mn % 70 Min C % 8% Max P % 0.30 Max S % 0.05 Max