It is used to grind high carbon steel, high speed steel and chilled steel. It can also be used as polishing materials and precision founding sand, spraying and coating materials, catalyst carrier, special ceramics and super refractory materials: Grain size Chemical Composition%(by Weight) AL2O3 TiO2 SiO2 Fe2O3 8-5mm ≥ 95.00 1.50-3.80 ≤ 1.50 ≤ 0.50 5-3mm ≥ 95.00 1.50-3.80 ≤ 1.50 ≤ 0.50 3-1mm ≥ 95.00 1.50-3.80 ≤ 1.50 ≤ 0.50 1-0mm ≥ 95.00 1.50-3.80 ≤ 1.50 ≤ 0.50 200mesh ≥ 94.50 1.50-3.80 ≤ 1.50 ≤ 0.50 F为固结磨具及喷砂用规格 W为微粉，320#即W40     White Fused Alumina Chemical compositions Physical properties Items Value of specification (%) Color White Al2O3       99.20-99.7 Melting point 2250 C SiO2       0.01-0.05 Bulk density 1.75-1.95g/cm3 Na2O       0.23-0.35 Grain density 3.90g/cm3 min Fe2O3       0.04-0.08   Hardness Morse hardness 9 Micro hardness 21600-22600kg/mm2 Package details 25kg PVC bags & 1 MT big bag content of magnetic substance 0.0023%max Usages grinding media, sandblasting media; surface cleaning, grit blasting, lapping, polishing, grinding, sandblasting, etching mineral skin abrasion materials metal finishing & surface preparation refractors, ceramics, coatings bonded & coated abrasives dental lab products Specifications                   Sizes   Refractory grade     Grain/Grit size 8-5mm, 5-3mm, 3-1mm, 1-0mm -8+5mm,-5+3mm,-3+1mm,-1+0mm 8-16,16-30,30-60,60-80 -8/+16, -16/+30, -30/+60, -30/+60   Fine powder -320mesh, -280mesh, -240mesh, -200mesh -180mesh, -150mesh, -120mesh, -100mesh 320F  280F   240F   200F  180F  150F   100F Abrasive grade Sandblasting grinding grade F8, F10, F12, F14, F16, F20, F22, F24, F30 F36, F40, F46, F54, F60, F70, F80, F90 F100, F120, F150, F180, F220 Micro powder Polishing grade “W” W63 W50 W40 W28 W20 W14 W10 W7 W5 W3.5 W2.5 W1.5 W0.5 “FEPA” F230 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 F2000   “JIS” 240# 280# 320# 360# 400# 500# 600# 700# 800# 1000# 1200# 1500# 2000# 2500# 3000# 4000# 6000# 8000#