Technical Information Grades and Grade Descriptions Modern coating technologiesprovide higher speed capabilities,PSteel greater productivity, and longer M Stainless Steel tool life. K Cast Iron Each insert has a material grid N Non-Ferrous indicating primary and alternate uses for that tool, as well as S High-Temp Alloys whether it can be operated H Hardened Materials dry or with coolant. primary use alternate use WWW Light (finishing) ¢¢¢ Light (finishing) WW Medium ¢¢ Medium W Heavy (roughing) ¢ Heavy (roughing) Grade P M K N S H dry withcoolant TN6525 WW ¢¢ ¢¢ • HC-P25 • PVD-TiAlN Nanolayer TN6540 W W ¢ WW • • HC-P40 • PVD-TiAlN Nanolayer TN7525 WW ¢¢ • HC-P25 • MT-CVD/CVD-TiN-TiCN-Al2O3-TiN TN7535 W ¢ ¢ • HC-P35 • MT-CVD/CVD-TiN-TiCN-Al2O3 TTI25 WWW ¢¢¢ • • HT-P15 • Cermet THM ¢ W ¢ • • HW-K15 • Uncoated widia.com G17