Metallic Silicon : Metallic Silicon: Friable Dark Gray Material, Hardener Of Alloys Based On Aluminum Or Copper. Obtaining : - By Reducing The Quartz In Electric Furnaces. Use : - As The Main Alloying Element For The Production Of Aluminum-silicon Alloys (silumin); - Alloying Element To Obtain Silicon Bronzes (copper-nickel-silicon Alloys). Properties : - Friable Material Of Dark Gray Color, Hardener Of Alloys Based On Aluminum Or Copper. Material Specification : According To Stas 9675/1980. Presentation : Granules 10 - 100 Mm Packaging : Big Bags 1.000 Kg Provenience : Import