... ~96%2200-2288BrownHigh HardnessGood tenacityCheapCarbon steel, alloy steel, malleable cast iron, hard bronzeWhite Fuse AluminaWAAl2O397~99%2200-2300WhiteGrinding the ... NitrideCBNCBN8000-9000BlackThermoduric, abrasive resistance, good electrical conductivityHard alloy, stainless steel, high-alloy steelArtificial DiamondMBDC10000MilkyHigh hardness, bad tenacity, expensive. AbrasivegrainsMicro ...