Silico-manganese (SiMn) and ferromanganese (FeMn) are well-known members of the Mn alloys group. Silicomanganese is produced by carbothermic reduction of oxidic raw materials in electric submerged arc furnaces.
Silico Manganese is an alloy with 60% to 70% manganese, 14% to 30% silicon, and 0.1% to 2.5% carbon. This alloy adds more silicon to improve some mechanical properties of steel.
SiMn | ||||||
LC | MC | HC | ||||
55/25 Grade |
55/25 Grade |
70/16 Grade |
65/16 Grade |
65/15 Grade |
60/14 Grade |
Chemical Specification |
55% – 60% Min | 55% – 60% Min | 70% Min | 65% Min | 65% Min | 60% Min | Manganese (Mn) |
25% – 30% Min | 20% – 25% Min | 16% Min | 16% Min | 15% Min | 14% Min | Silicon (Si) |
0.2% Max | 0.5% Max | 2% Max | 2% Max | 2.25% Max | 2.50% Max | Carbon (C) |
0.15% Max | 0.15% Max | 0.30% Max | 0.35% Max | 0.35% Max | 0.35% Max | Phosphorus (P) |
0.03% Max | 0.03% Max | 0.03% Max | 0.03% Max | 0.03% Max | 0.03% Max | Sulphur (S) |