... achieve their greatest value.Our main products cover: Silicon metal, Pure magnesium metal, Magnesium alloys, Mg powder, Mg butt end, ... 4105, 3303,2502, 2202, 1101 etc. Standard of Silicon Metal GradeChemical composition(%) Si(≥)Impurities(≤) FeAlCa 55398.500.500.500 ... sizing 10-100mm 90% minimumVarious chemical analysis,sizing and packing forms are available upon customer's request. Silicon Metal 553