A Grades A1 to A35 A Grades A CBN Ceramic C Carbonitride alloy C C C C Coated carbide C Cermet Carbide Selection of Sumitomo Grades (Turning) ……… A2 Selection of Sumitomo Grades (Milling) ………… A3 Grade Comparison Chart (Coated) …………………… A4            (Cermet, Carbide, Ceramic) … A5            (CBN, Polycrystalline Diamond) … A6 Chipbreaker Comparison Chart …………………… A7 Application-Specific Chipbreaker & Grade Selection Guide  Steel Turning Inserts ……………………………… A8  Stainless Steel Turning Inserts ……………… A12  Cast Iron Turning Inserts ……………………… A14  Exotic Alloy Turning Inserts…………………… A16  Hardened Steel Turning Inserts ……………… A18  Non-Ferrous Metal Turning Inserts ………… A20  Inserts for Small Product Machining ……… A22 Coated Carbide …………………………………… A24 Cermet ……………………………………………… A27 Carbide ……………………………………………… A28 CBN ………………………………………………… A30 Polycrystalline Diamond ………………………… A32 Ceramic ……………………………………………… A34 Material Properties………………………………… A35 A1