high quality silicon metal 553 for steel making and casting low price Metal Silicon Silicon metal, also known as industrial silicon is a smelting product made by quartz and coke in electric heating furnace. Its component, silicon content is at about 98% (during recent years , the product whose Si content is at 99.99% also can be included in metal Silicon), the balance impurity is Fe,Al,Ca and so on.Silicon metal is widely used in smelting alloy elements,as a reducing agent in many kinds of metal smelting .Uses: As non-ferrous alloy additives.GradeCompositionSiImpurities (%)FeAlCa≤110199.790.10.10.01150199.690.150.150.01220299.580.20.20.02250299.480.250.250.0255398.70.50.50.3Size: 10-50mm,50-100mm or as customers' requirements. Packing: Ton parcel, 1000kg/bag