brown fused alumina FEPA P grit, for making premium quality ... Physical Properties:Color RedShape Angular, edge sharpCrystal Form Alpha alumina trigonal systemSpecific Gravity 3.94Hardness 2090 Knoop scale, 9. ... 1:2006 or ISO 6344-2: 1998 Key words:ceramic coating aluminium oxide grain, calcined aluminium oxide grain, ... oxide,fused brown corundum,corundum,brown fused alumina,brown aluminium oxide,fused ...