Grade overview Solid carbide drills Coated cemented carbide PVD Grade Grade description A Turning PVD coated P10–P20/M10–M20/K10–K20 carbide grade for steel, stainless steel and cast iron. Good wear resistance and KDG303 toughness for a wide application field. Uncoated cemented carbide Grade Grade description B Milling YK20F Uncoated K20 carbide substrate for steel, cast iron and non ferrous materials. YK30F Uncoated K30 carbide substrate for steel, stainless steel, cast iron and non ferrous materials. C Drilling D Information Technical E Index C 27