General turning Recommended cutting data Turning insert, negative A Starting values for cutting speed vc [m/min] Machining group HC (CVD) Brinell Material group Composition / structure / heat treatment hardness YB6315 YBC152 YBC252 HB Feed rate [mm] Feed rate [mm] Feed rate [mm] 0,1 0,2 0,6 0,1 0,2 0,6 0,1 0,4 0,8 Turning approx. 0,15 % C annealed 125 1 500 400 270 500 400 270 480 370 230 approx. 0,45 % C annealed 190 2 420 340 230 420 340 230 400 310 190 Unalloyed steel approx. 0,45 % C tempered 250 3 330 280 200 330 280 200 310 250 160 approx. 0,75 % C annealed 270 4 320 270 190 320 270 190 300 240 150 approx. 0,75 % C tempered 300 5 280 240 170 280 240 170 260 210 130 P annealed 180 6 400 300 180 400 300 180 380 290 170 tempered 275 7 280 230 150 280 230 150 260 210 140 B Low-alloyed steel tempered tempered 300 350 8 9 260 230 220 190 150 120 260 230 220 190 150 120 240 220 200 180 140 110 High-alloyed steel and high-alloyed annealed 200 10 360 290 190 360 290 190 310 250 170 tool steel hardened and tempered 325 11 190 160 130 190 160 130 150 130 100 ferritic/martensitic annealed 200 12 Milling martensitic tempered 240 13 M Stainless steel austenitic quench hardened 180 14 austenitic-ferritic 230 15 perlitic/ferritic 180 16 Grey cast iron perlitic (martensitic) 260 17 ferritic 160 18 K Cast iron with spheroidal graphite perlitic 250 19 C Malleable cast iron ferritic perlitic 130 230 20 21 cannot be hardened 60 22 Aluminium wrought alloys hardenable hardened 100 23 ≤ 12 % Si, cannot be hardened 75 24 Cast aluminium alloys ≤ 12 % Si, hardenable hardened 90 25 Drilling N > 12 % Si, cannot be hardened 130 26 machining steel, PB> 1% 110 27 Copper and copper alloys CuZn, CuSnZn 90 28 (bronze/brass) CuSn, Pb-free copper, electrolytic copper 100 29 annealed 200 30 Fe-based alloys hardened 280 31 Heat-resistant alloys annealed 250 32 D S Ni or Co bass hardened cast 350 320 33 34 pure titanium Rm 400 35 Titanium alloys α and β alloys hardened Rm 1050 36 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 324