... Lumps, F4-F240 Typical Properties: According to customer's requirement Brown Fused AluminaMixed Sizes(mm)Main Chemical content(%)Other Chemical content ... 3.8 Fe2O3<0.2CaO<0.5 Grit SizeCHEMICAL COMPOSITION OF BROWN FUSED ALUMINIUM OXIDE %(by weight)MAGNETIC MATTER CONTENTAL2O3TIO24#~90#94 ... : in accordance with GB/T2478-19962. Size: Full range of grits in accordance with GB/T2481,GB/T9258,FEPA,JIS ...