Micron cBN differs from micron diamond because of its chemical composition, hardness, thermal stability, and chemical stability. CBN is less hard than diamond and less reactive to hot temperatures. Therefore, micron cBN powder is best used on super hard metals such as steel. Due to the higher thermal conductivity when cutting steel, there is less chance of burning or damaging the workpiece. However, use micron diamond to cut tempered glass, concrete, granite, or non-metallic material.