General turning Recommended cutting data Turning insert, positive A Starting values for cutting speed vc [m/min] Machining group HC (CVD) HC (PVD) Brinell Material group Composition / structure / heat treatment hardness YBD152C YBG101 YBG105 HB Feed rate [mm] Feed rate [mm] Feed rate [mm] 0,1 0,2 0,4 0,1 0,2 0,4 0,1 0,2 0,4 Turning approx. 0,15 % C annealed 125 1 approx. 0,45 % C annealed 190 2 Unalloyed steel approx. 0,45 % C tempered 250 3 approx. 0,75 % C annealed 270 4 approx. 0,75 % C tempered 300 5 P annealed 180 6 tempered 275 7 B Low-alloyed steel tempered tempered 300 350 8 9 High-alloyed steel and high-alloyed annealed 200 10 tool steel hardened and tempered 325 11 ferritic/martensitic annealed 200 12 305 245 205 Milling martensitic tempered 240 13 150 125 100 M Stainless steel austenitic quench hardened 180 14 200 165 145 austenitic-ferritic 230 15 160 130 115 perlitic/ferritic 180 16 520 360 200 Grey cast iron perlitic (martensitic) 260 17 280 210 135 ferritic 160 18 280 220 135 K Cast iron with spheroidal graphite perlitic 250 19 210 160 100 C Malleable cast iron ferritic perlitic 130 230 20 21 280 210 245 160 180 100 cannot be hardened 60 22 1800 880 - Aluminium wrought alloys hardenable hardened 100 23 540 380 - ≤ 12 % Si, cannot be hardened 75 24 500 270 - Cast aluminium alloys ≤ 12 % Si, hardenable hardened 90 25 320 170 - Drilling N > 12 % Si, cannot be hardened 130 26 290 150 - machining steel, PB> 1% 110 27 660 320 - Copper and copper alloys CuZn, CuSnZn 90 28 330 300 - (bronze/brass) CuSn, Pb-free copper, electrolytic copper 100 29 220 175 - annealed 200 30 50 35 - 60 45 - Fe-based alloys hardened 280 31 45 30 - 55 40 - Heat-resistant alloys annealed 250 32 45 30 - 55 40 - D S Ni or Co bass hardened cast 350 320 33 34 40 40 - - - - 50 50 35 35 - - pure titanium Rm 400 35 85 60 - 95 60 - Titanium alloys α and β alloys hardened Rm 1050 36 65 40 - 75 40 - Information hardened and tempered 55 HRC 37 Technical Hardened steel 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 Plastic, glass-fibre reinforced GFRP 43 X Non-metallic materials Plastic, carbon fibre reinforced CFRP 44 E 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. For examples of material for cutting tool groups view page D22. Index A 332