... TiO2:2.3% maxCaO: 0.4% max Brown Fused Alumina A :Properties: The bauxite, coke (anthracite) as main raw material, ... , suitable for grinding high tensile strength metal, such as a variety of general-purpose steel, malleable iron and hard bronze ... , etc. It can also create high level refractory material.Physical Performance Index Item IndexColorBrownCrystal shapeTrigonalHardness(mohs)≥9 ...