... 2,precision sand mold, 3,casting,spraying 4,coating materials. White Fused Alumina White Fused Alumina is used as polishing materials and precision sand mold, casting ... are suitable for the grinding of high carbon steel, high speed steel and quenching steel. They are also used as polishing materials and ... than 0.80W10-W5more than 97.00less than 0.80 White Fused Alumina for casting and spraying