| ISO | Material | Material Designation | Material Condition | Hardness | Cutting Speed Recommendations (Vc) |
| K | 15 | Grey cast iron (GG) | Pearlitic/ferritic | 180 HB | 1640-4920 sfm |
| K | 17 | Nodular cast iron (GGG) | Ferritic | 160 HB | 1640-3935 sfm |
| K | 19 | Malleable cast iron | Ferritic | 130 HB | 1640-4920 sfm |
| S | 31 | High temp. alloys Fe based | Annealed | 200 HB | 490-655 sfm |
| S | 33 | High temp. alloys Ni or Co based | Annealed | 250 HB | 230-395 sfm |
| S | 34 | High temp. alloys. Ni or Co based | Hardened | 350 HB | 195-295 sfm |
| S | 35 | High temp. alloys. Ni or Co based | Cast | 320 HB | 230-330 sfm |
| H | 38 | Hardened steel | Hardened | 55 HRC | 360-655 sfm |
| H | 39 | Hardened steel | Hardened | 60 HRC | 295-560 sfm |
| H | 40 | Chilled cast iron | Cast | 400 HB | 395-720 sfm |
| H | 41 | Cast iron | Hardened | 55 HRC | 360-655 sfm |