TurningMillingDrillingTechnicalInformationIndex Grade overview Indexable milling Cermet A Grade ISO Micro structure Grade description YNG151 P05 - P15 Uncoated P05–P15 cermet grade for fine finishing operation of steel and stainless steel.Good resistance against plastic deformation for good surface finishing. PVD coated P05–P15 cermet grade for fine finishing operation of steel and stainless YNG151C P05 - P15 steel. Good wear resistance and capability against plastic deformation for good surfaceroughness.B Uncoated cemented carbide Grade ISO Micro structure Grade description YC30S P25 - P40M25 - M40 Uncoated P25–P40/M25–M40 carbide substrate for roughing operation of steel andstainless steel. C YD101 N05 - N25K05 - K20 Uncoated K05–K20/N05–N20 carbide substrate for fine to medium application inaluminum and other material. D YD201 K10 - K30N10 - N30 Uncoated K10–K30/N10–N30 carbide substrate for medium application in aluminum andother material. E B 23