... hardness, low toughness, high purity, excellent self-sharpening, grinding power, heat, high efficiency,acid corrosion, high temperature, ... not only advanced abrasives materials,and or advanced grinding, polishing steel and stainless steel. It is ... #,2000#,2500#,3000#,4000#Refactory grade: 1-0mm,3-1mm,5-3mm,5-8mm-200mesh,-240mesh,-300mesh specificationChemicalcomposition( % )Magneticmeterial content ...