| ISO | Materials | Material Designation | Material Condition | Cutting Speed Recommendations (Vc) |
| K | 15 | Grey cast iron (GG) | Pearlitic/ferritic :180 | 150-700 m/min |
| K | 16 | Grey cast iron (GG) | Pearlitic/martensiti :260 | 150-700 m/min |
| K | 17 | Nodular cast iron (GGG) | Ferritic :160 | 140-370 m/min |
| K | 18 | Nodular cast iron (GGG) | Pearlitic :250 | 140-370 m/min |
| K | 19 | Malleable cast iron. | Ferritic :130 | 140-370 m/min |
| K | 20 | Malleable cast iron. | Pearlitic :230 | 140-370 m/min |