TurningMillingDrillingTechnicalInformationIndex Grade overview General turning Ceramic A Grade ISO Micro structure Grade description CN2000 K10 - K30 Uncoated K10–K30 Si3N4 Ceramic grade for medium operation in grey cast iron also withinterrupted cut. Good wear resistance, toughness and thermal stability. Uncoated cemented carbide B Grade ISO Micro structure Grade description YD101 N05 - N20K05 - K20 Uncoated N05–N20/K05–K20 carbide substrate for fine to medium application inaluminum and other material. YD201 N10 - N30K10 - K30 Uncoated N10–N30/K10–K30 carbide substrate for medium application in aluminum andother material.C CBN Grade ISO Micro structure Grade description YCB111 H01 - H10 Uncoated, brazed H01–H10 CBN grade for fine finishing operation in hardened steel withcontinuous cut. High wear resistance and productivity at higher cutting speed.D Uncoated, brazed H10–H25 CBN grade for fine to medium application in hardened steel YCB121 H10 - H25 from continuous to light interrupted cut. Good wear resistance and toughness for universal use. Uncoated, brazed H20–H35 CBN grade for fine to medium application in hardened steel E YCB131 H20 - H35 with interrupted cut. Good wear resistance and optimized toughness for safe process. A 35