High Carbon Silicon Manganese consists of minimum 65% manganese. Centom Steels & Ferro Alloys Ltd. Manufactures High Carbon Silicon Manganese. Centom Steels & Ferro Alloys Ltd. Also manufactures different ranges of Silicon Manganese. High Carbon Silicon Manganese contains minimum 15 % silicon. It is available with maximum 0.30% potassium. It can also be customised as per customer requirement.