CERMETCBNPCDCERAMICS MATERIALS AND GRADES USER GUIDE ISCAR Milling Grades Chart Grade ISO Grade Description Uncoated Layers Uncoated P10-P30 M10-M20 A tough cermet grade, suitable for machining steels and stainless IC30N steel at medium to high cutting speeds and low feeds. Featuresexcellent surface finish, very good wear resistance and prevents built-up edge. H10-H25 Base IB55 K05-K15 A PCBN grade, suitable for finishing operations on hardenedsteels (45-65 HRC) and cast iron in continuous cutting and light interrupted cuts. H10-H25 Base K01-K15 A PCBN grade, used for high speed machining of cast iron, IB85 cemented tungsten carbide, sintered metals, and heavy alloys. Excellent for interrupted cutting of hardened steel. S05-S10 H05-H10 Base A PCD brazed tip, suitable for machining aluminum alloys (Si < 12%) and other non-ferrous materials. Features very high wear ID5 N01-N10 resistance with high toughness.Suitable for finishing operations and can be used for semi roughing operations and interrupted cuts. Base A ceramic SiAlON grade for machining high temperature alloys IS35 such as Inconel, Waspaloy and Rene. Provides high hardness with excellent toughness. S15-S25 Base K01-K15 A silicon nitride (Si3N4) grade, suitable for turning and milling IS8 applications. Can be used for interrupted cuts on cast iron and nickel-based alloys. Base IW7 A whisker-reinforced ceramic grade for machining hightemperature alloys and hardened steel at high cutting speeds. S10-S20 H05-H25 Base 725