... temperature.It's chemical composition contains Al2O3, TiO2, and small amount of SiO2, and Fe2O3, etc,. Microhardness:1800-2200 kg/mm2,toughness ... of high-tensile strength such as steel, annealed malleable iron and hard bronze etc..Browm fused alumina can also be used ... free time in china. Hongtai abrasives brown fused alumina for Cutting-off Wheels