Selection of Sumitomo Selection Guide by Work Material and Cutting Process Grades (Milling) Cutting Process General Steel (Carbon Steel, Alloy Steel), Soft Steel Stainless Steel Cast Iron Wear Resistance Fracture Resistance Wear Resistance Fracture Resistance Wear Resistance Fracture Resistance ISO Classification - P01 P10 P20 P30 P40 - M01 M10 M20 M30 M40 - K01 K10 K20 K30 A P ACM100 Grades ACP100 C ACK100 C ACM200C Coated ACP200 ACM300 ACK200 C Carbide P P P ACK300 P ACP300 P ACK300 P ACP300 A24 T250A T250A Cermet T4500A T4500A A27 Carbide A30N A30N G10E A28 Ceramic NB90M A34 BNS800 Uncoated CBN Coated CBN BN7000 A30 Cutting Process Exotic Alloy Hardened Steel Non-Ferrous Metal Wear Resistance Fracture Resistance Wear Resistance Fracture Resistance Wear Resistance Fracture Resistance ISO Classification - S01 S10 S20 S30 S40 - H01 H10 H20 H30 - N01 N10 N20 N30 P ACM100 ACM200C Coated DL1000 Carbide P P ACM300 P ACK300 A24 Carbide EH520 H1 A28 BN7000 Uncoated CBN BN350 A30 PCD DA1000 A32 : 1st Recommendation : 2nd Recommendation C : CVD Coating P : PVD Coating Blank: Uncoated A3