White fused alumina electrically fused in arc furnace with high grade processed alumina as raw material. It is characterized by high hardness, high purity, ability of self-sharpening, good ability of grinding and so on, it widely used for bonded and coated abrasives , polishing,precision casting and so on. Item Specification Colour white Crystal System trigonal system Mohs Hardness â?¥9 Melting Temperatureï¼?â??ï¼? 2150 Refractory Temperatureï¼?â??ï¼? 1950 True Density â?¥3. 50