| ISO | Material | Material Designation | Material Condition | Hardness | Cutting Speed Recommendations (Vc) |
| K | 15 | Grey cast iron (GG) | Pearlitic/ferritic | 180 HB | 50-110 m/min |
| K | 16 | Grey cast iron (GG) | Pearlitic/martensitic | 260 HB | 40-70 m/min |
| K | 17 | Nodular cast iron (GGG) | Ferritic | 160 HB | 60-90 m/min |
| K | 18 | Nodular cast iron (GGG) | Pearlitic | 250 HB | 40-80 m/min |
| K | 19 | Malleable cast iron | Ferritic | 130 HB | 60-90 m/min |
| K | 20 | Malleable cast iron | Pearlitic | 230 HB | 50-90 m/min |
| N | 21 | Aluminum-wrought alloys | Not hardenable | 60 HB | 300-800 m/min |
| N | 22 | Aluminum-wrought alloys | Hardenable | 100 HB | 230-310 m/min |
| N | 23 | Aluminum-cast alloys <=12% Si | Not hardenable | 75 HB | 280-830 m/min |
| N | 24 | Aluminum-cast alloys <=12% Si | Hardenable | 90 HB | 200-500 m/min |
| N | 25 | Aluminum-cast alloys >12% Si | High temperature | 130 HB | 170-300 m/min |
| N | 26 | Copper alloys >1% Pb | Free cutting | 110 HB | 150-250 m/min |
| N | 27 | Copper alloys | Brass | 90 HB | 120-200 m/min |
| N | 28 | Copper alloys | Electrolytic copper | 100 HB | 90-150 m/min |
| S | 31 | High temp. alloys Fe based | Annealed | 200 HB | 30-40 m/min |
| S | 32 | High temp. alloys Fe based | Hardened | 280 HB | 20-40 m/min |
| S | 33 | High temp. alloys Ni or Co based | Annealed | 250 HB | 20-30 m/min |
| S | 34 | High temp. alloys. Ni or Co based | Hardened | 350 HB | 15-20 m/min |
| S | 35 | High temp. alloys. Ni or Co based | Cast | 320 HB | 15-20 m/min |
| S | 36 | Titanium (pure) | Pure | 190 HB | 50-90 m/min |
| S | 37 | Titanium alloys | Alpha+beta alloys, hardened | 310 HB | 20-50 m/min |