Brown Fused Alumina is fused and crystallized under high temperature from a mixture of bauxite and other raw materials. It is brown and features high hardness and toughness. The Abrasives tools made of it are suitable for grinding metals of high-tensile strength such as carbon steel, general-purposelloy steel, malleable cast iron and hard bronze, etc. It also can be used as refractory materals, chemical additives, precision founding and anti-sliding materials.

Chemical compositions:
F4-F80 (P12-P80): Al2O3: 95.00%-97.50%, TiO2: 1.5%-1.8%; CaO: Less than 0.45%
F90-F150 (P100-P150): Al2O3: 94.00%-97.50%, TiO2: 1.5%-1.8%; CaO: Less than 0.45%
F180-F220 (P180-P220): Al2O3: 93.00%-97.50%, TiO2: 1.5%-1.8%; CaO: Less than 0.45%
F220 (P220) finer: Al2O3: More than 92.00%