HIGH CARBON SILICO MANGANESE 65/15 Component Specification Manganese 65% Min Silicon 15% Min Carbon 2.25% Max Phos. 0.35% Max Sulphur 0.05% Max HIGH CARBON SILICO MANGANESE 65/15 Component Specification Manganese 65% Min Silicon 15% Min Carbon 2.25% Max Phos. 0.35% Max Sulphur 0.05% Max