APKT HM milling inserts feature thin PVD coated TiCN layer on a P45-K40 substrate for very high toughness. Ideal for milling, parting and grooving of steel, stainless and alloy steels at low to medium cutting speeds and for unstable machining conditions. Features and Benefits P45-K40 substrate for very high toughness PVD coated TiCN layer for greater heat and wear resistance Suitable for low to medium cutting speeds and unstable machining conditions 2 helical cutting edges for general use applications Typical Applications Milling Steel Stainless steel Alloy steels Standards Insert Grade : IC328 ISO Range - P/M/K: (P25-P40)(M30-M40) ISO Range - H/S/N: (S20-S30)