Grade CW2015CW5025CW3020WBK40UWBH10P Advanced Material Inserts Grades and Grade Descriptions P Steel Reduce cycle times. High speed M Stainless Steel and feed capability. Long tool life. K Cast Iron New multi-layer coating provides better wear resistance. N Non-Ferrous S High-Temp Alloys H Hardened Materials wear resistance toughness Coating Grade Description 05 10 15 20 25 30 35 40 45 Mixed (black) ceramic. Matrix Al2O3 and TiCN. Good toughness properties combined K with good wear resistance. Semi-finishing and finishing. For hardened iron base materials and grey cast iron (finishing). CM-H10 H Silicon-nitride ceramic. Extraordinary toughness properties. Roughing, also in heavily K interrupted cuts. Capable of high-performance turning. To be used with or without coolant. For grey cast iron. CN-K15 Whisker ceramic with a matrix of Al2O3 + SiCw. The SiC whiskers embedded in the micro-structure give this ceramic excellent toughness for cutting high-temp alloys and cast materials with high Brinell hardness. S C4 H A high CBN content, solid CBN insert with multiple cutting edges. Applied in roughing to finishing of fully pearlitic grey cast iron, chilled irons, high-chrome alloyed steels, sintered powdered metals, and heavy cuts in hardened steels (>45 HRC). Use for K finishing chilled and fully pearlitic cast iron. Solid inserts offer better security and shock-resistance than tipped inserts, while also enabling deeper depth-of-cut capability. BN-K40 H A low content CBN grade with a PVD-TiAlN coating for added wear resistance. Designed for precision machining of hardened steels (>45 HRC); the harder the steel the better. PVD coating offers improved wear resistance and excellent surface finish capability. Effectively applied on bearing steels, hot and cold work tool steels, high-speed steels, die steels, case-hardened steels, carburised and nitrided irons, and some hard coatings. BN-H10 H widia.com B173