Black Carborundum Black silicon carbide SiC F600 Silicon carbide is mainly made of quartz sand,petroleum coke,smelted by above 2500 in the electric furnace , thehardness is between corundum and diamond,the hardness is superior to corundum, it has the function of conductivity and thermal conductivity. It is suitable to process metals and nonmetallic materials. Such as gray cast iron,non-ferrous metals, stone,leather,rubber and so on . It also widely used in refractories,metallurgical Additives. Our Services 1,Professional sales team and 7*24 hours online customer service   2,Professional machine produce line and high quality goods   3,Professional transport term to gurantee safe delivery   4,Professional research team to provide customized service