We could supply you with all kinds of silicon metal like 553, 441,421,411,4405,4105, 3303,2502, 2202, ... to achieve their greatest value.Our main products cover: Silicon metal, Pure magnesium metal, Magnesium alloys, Mg powder, Mg butt end, etc.We ... ,4405,4105, 3303,2502, 2202, 1101 etc. Standard of Silicon Metal GradeChemical composition(%) Si(≥)Impurities(≤) FeAlCa 55398.500.500.500.30 44199.000 ...