We could supply you with all kinds of silicon metal like 553, 441,421,411,4405,4105, 3303, ... end, etc.We could supply you with all kinds of silicon metal like 553, 441,421,411,4405,4105, 3303,2502 ... , 2202, 1101 etc. Standard of Silicon Metal GradeChemical composition(%) Si(≥)Impurities(≤) FeAlCa 55398.500.500.500. ... forms are available upon customer's request. Silicon Metal 553