Selection of Milling Grades General Steel(Carbon Steel, Alloy Steel), Soft Steel Stainless Steel Cast Iron Application 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 C P ACM100 C ACP100 C ACK100 ACM200 C Coated Carbide P ACP200 P ACM300 ACK200 P ACK300 P ACP300 P ACK300 P ACP300 A24 T250A T250A Cermet T4500A T4500A A27 Carbide A30N A30N G10E A28 Ceramic A34 NB90M BNS800 Uncoated CBN BN7000 H A30 Exotic Alloy Hardened steel Non-Ferrous Metal Cutters Application Milling 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 Face Milling Shoulder P ACM100 Milling High Feed C ACM200 Radius Multi- Coated Carbide P DL1000 Purpose R/ P ACM300 Profiling Groove/ T-Slot P ACK300 Chamfering A24 Aluminum/ Light Alloys High-Speed Cast Iron Carbide EH520 H1 A28 BN7000 Uncoated CBN BN350 A30 PCD DA1000 A32 : First recommended grade : Second recommended grade C : CVD coating P : PVD coating Blank : Non-coated H12