
MATERIALS HARDNESS/Rm
| P1 | Free cutting steel and structural steel | < 500 N/mm² | |
| P2 | Carbon steel and low alloy steel | 500-700 N/mm² | |
| P3 | Medium alloy steel and heat treated steel | 600-800 N/mm² |
| MATERIALS | HARDNESS/Rm | |
| P1 | Free cutting steel and structural steel | < 500 N/mm² |
| P2 | Carbon steel and low alloy steel | 500-700 N/mm² |
| P3 | Medium alloy steel and heat treated steel | 600-800 N/mm² |
| P4 | High alloy steel | 800-1000 N/mm² |
| P5 | Tool steel | 900-1200 N/mm² |
| P6 | High tensile strength steel | 1200-1480 N/mm² |
| P7 | Ferritic - Martensitic stainless steel | |
| P8 | PH stainless steel | |
| M1 | Austenitic stainless steel (good machinability) | |
| M2 | Austenitic stainless steel (medium machinability) and Duplex | |
| M3 | Super austenitic stainless steel and super Duplex | |
| K1 | Grey cast iron | 150-250 HB |
| K2 | Nodular cast iron | 150-350 HB |
| K3 | Austenitic cast iron | 120-260 HB |
| K4 | ADI cast iron | 250-500 HB |
| N1 | Aluminium alloys ≤ 12% Si | |
| N2 | Aluminium alloy > 12% Si and Aluminium-Magnesium | |
| N3 | Copper alloy | |
| N4 | Brass alloy and Bronze alloy | |
| N5 | Plastic material | |
| N6 | Carbon fiber and composite | |
| S1 | Heat resistant super alloys (HRSA) Ni base (good machinability) | < 25 HRC |
| S2 | Heat resistant super alloys (HRSA) Ni base (medium machinability) | 25-35 HRC |
| S3 | Heat resistant super alloys (HRSA) Ni base (low machinability) | 35-45 HRC |
| S4 | Low Titanium base alloy (good machinability) | |
| S5 | High Titanium base alloy (medium machinability) | |
| H1 | Hardened steel | 50-56 HRC |
| H2 | Hardened bearing steel | 54-62 HRC |
| H3 | Hardened tool steel | 60-65 HRC |
| H4 | Hardened martensitic stainless steel | 50-56 HRC |
| H5 | Hardened white cast iron | 48-55 HRC |