TurningMillingDrillingTechnicalInformationIndex Indexable drills Grade overview Coated cemented carbide CVD A Grade ISO Micro structure Grade description YB6338 P20 - P40K20 - K40 CVD coated P20–P40/K20–K40 carbide substrate for operation with higher cutting speedand feed rate in steel and cast iron. B YBD252 K20 - K35 CVD coated K20–K35 carbide substrate. Optimized for medium to roughing operation ofcast iron and Steel. Good wear resistance and toughness at higher cutting speed. Coated cemented carbide PVD Grade ISO Micro structure Grade description C YBG202 P10 - P30M10 - M25 PVD coated M10–M25/P10–P30 carbide substrate for finishing to medium application ofstainless steel and steel (milling). Good wear resistance in a wide application field. P10 - P30 PVD multilayer coated P10–P30/M20–M40/S15–S25 carbide substrate for finishing to YBG205 M20 - M40 medium application of stainless steel, super alloy and steel (milling). Good wear S15-S25 resistance and thermal stability in a wide application field. D YBG212 P25 - P35M25-M40 PVD coated M25–M40/P25–P35 carbide substrate for steel and stainless steel. Especiallyfor inner insert at drilling operation. Uncoated cemented carbide Grade ISO Micro structure Grade description E YD201 K10 - K30N10 - N30 Uncoated N10–N30/K10–K30 carbide substrate for medium application in aluminum andother material. C4