Brown Fused Alumina 1,with bauxite as raw materials 2,one of the most basic abrasives 3,widely used for ... of it are suitable for the grinding of car bon steel,malleable castiron,hard bronze,etc.In addition,they are also ... AI2O3 TiO2 CaO A A-P1 F4-F8095.0-97.5 1.5-3.8 max 0.45 F90-F150094.0-97 ... hardness g/mm2 α— AI2O3 300~1200 min 3.90 1.5~1.95 1800~2200 come from china HDLL 90% Brown Fused Alumina