
| group | HC | 1 Starting values for cutting speed vc [m/min] | ||||||
| Material group | Composition / struc | ture / heat treatment | HB | ining | YNG1 | 51C | ||
| ch | ae/ | D | ||||||
| Ma | 1/1 | 3/4 | 1/5 | |||||
| approx. 0,15 % C | annealed | 125 | 1 | 285 | 335 | |||
| approx. 0,45 % C | annealed | 190 | 2 | 250 | 285 | |||
| Unalloyed steel | approx. 0,45 % C | tempered | 250 | 3 | 235 | 270 | ||
| approx. 0,75 % C | annealed | 270 | 4 | 205 | 235 | |||
| approx. 0,75 % C | tempered | 300 | 5 | 190 | 225 | |||
| P | annealed | 180 | 6 | 250 | 285 | |||
| Low-alloyed steel | tempered | 275 | 7 | 205 | 235 | |||
| tempered | 300 | 8 | 190 | 225 | ||||
| tempered | 350 | 9 | 160 | 190 | ||||
| High-alloyed steel and high-alloyed | annealed | 200 | 10 | 150 | 170 | |||
| tool steel | hardened and tempered | 325 | 11 | 105 | 120 | |||
| ferritic/martensitic | annealed | 200 | 12 | 145 | 170 | |||
| M | Stainless steel | martensitic | tempered | 240 | 13 | 120 | 145 | |
| austenitic | quench hardened | 180 | 14 | 155 | 180 | |||
| austenitic-ferritic | 230 | 15 | 120 | 145 | ||||
| Grey cast iron | perlitic/ferritic | 180 | 16 | |||||
| perlitic (martensitic) | 260 | 17 | ||||||
| K | Cast iron with spheroidal graphite | ferritic | 160 | 18 | ||||
| perlitic | 250 | 19 | ||||||
| Malleable cast iron | ferritic | 130 | 20 | |||||
| perlitic | 230 | 21 | ||||||
| Aluminium wrought alloys | cannot be hardened | 60 | 22 | |||||
| hardenable | hardened | 100 | 23 | |||||
| ≤ 12 % Si, cannot be hardene | d | 75 | 24 | |||||
| N | Cast aluminium alloys | ≤ 12 % Si, hardenable | hardened | 90 | 25 | |||
| > 12 % Si, cannot be hardene | d | 130 | 26 | |||||
| machining steel, PB> 1% | 110 | 27 | ||||||
| Copper and copper alloys (bronze/brass) | CuZn, CuSnZn | 90 | 28 | |||||
| CuSn, Pb-free copper, electro | lytic copper | 100 | 29 | |||||
| Fbd ll | annealed | 200 | 30 | |||||
| e-ase aoys | hardened | 280 | 31 | |||||
| Heat-resistant alloys | annealed | 250 | 32 | |||||
| S | Ni or Co bass | hardened | 350 | 33 | ||||
| cast | 320 | 34 | ||||||
| Titanium allos | pure titanium | Rm400 | 35 | |||||
| y | α and β alloys | hardened | Rm1050 | 36 | ||||
| Hardened steel | hardened and tempered | 55 HRC | 37 | |||||
| hardened and tempered | 60 HRC | 38 | ||||||
| H | Hard cast iron | cast | 400 | 39 | ||||
| Hardened cast iron | hardened and tempered | 55 HRC | 40 | |||||
| Thermoplasts | 41 | |||||||
| Thermosetting plastics | 42 | |||||||
| X | Non-metallic materials | Plastic, glass-fibre reinforced | i GFRP | 43 | ||||
| Plastic, carbon fibre reinforce | idCFRP | 44 | ||||||
| Graphite Wood | 45 46 |
Note: The given cutting values are guide values, which were determined under ideal conditions. The values have to be adapted in individual cases. Feed rate recommendations on page B248. For examples of material for cutting tool groups view page D22.