Recommendations	Technical Recommendations
	material groups material material-no. cutting speed Vc (m/min) cooling fluids   specification DIN   carbon bi-Metal cutting oil emulsion   structural steels St 37 - 2 1.0037 30 - 50 80 - 100   x   St 50 - 2 1.0050 30 - 45 60 - 85   x   St 60 - 2 1.0060 30 - 40 50 - 70   x   case-hardening steels C 10 1.0301 40 - 60 80 - 100 x     14 NiCr 14 1.5752 25 - 30 40 - 55 x     21 NiCrMo 2 1.6523 30 - 40 50 - 60 x     16 MnCr 5 1.7131 25 - 30 40 - 60 x     free-machining steels 9 S 20 1.0711 40 - 60 80 - 120   x   45 S 20 1.0727 40 - 60 80 - 120   x   heat treatable steels C 45 1.0503 35 - 50 60 - 70   x   40 Mn 4 1.1157 30 - 40 60 - 70   x   36 NiCr 6 1.5710 30 - 40 60 - 70   x   34 CrNiMo 6 1.6582 25 - 35 50 - 65   x   42 CrMo 4 1.7225 25 - 35 50 - 65   x   ball bearing steels 100 Cr 6 1.3505 20 - 30 35 - 50   x   100 CrMn 6 1.3520 20 - 30 35 - 50   x   spring steels 65 Si 7 1.5028 25 - 35 45 - 60   x   50 CrV 4 1.8159 25 - 35 45 - 60   x   unalloyed tool steels C 125 W 1.1663 20 - 30 40 - 60   x   C 75 W 1.1750 20 - 30 40 - 60   x   cold-work tool steels 125 Cr 1 1.2002 20 - 30 40 - 50 x x   X 210 Cr 12 1.2080 15 - 25 30 - 40 x x   X 155 CrVMo 12 1 1.2379 15 - 25 30 - 40 dry x   X 42 Cr 13 1.2083 20 - 25 35 - 45 x x   X 165 CrV 12 1.2201 15 - 25 30 - 45 x x   100 CrMo 5 1.2303 15 - 30 30 - 50 x x   X 32 CrMoV 3 3 1.2365 25 - 35 45 - 60 x x   45 WCrV 7 1.2542 20 - 30 40 - 50 x x   hot-work tool steels 56 NiCrMoV 7 1.2714 20 - 30 40 - 50 x x   high-speed steels S 6-5-2-5 (E Mo5 Co5) 1.3243 20 - 30 35 - 45   x   45 WCrV 7 1.3247 20 - 30 35 - 45   x   45 WCrV 7 1.3343 20 - 30 35 - 45   x   valve steels X 45 CrSi 9 3 1.4718 - 30 - 45 x x   X 45 CrNiW 18 9 1.4873 - 30 - 40 x x   high temperature steels X 20 Cr MoV 12 1 1.4922 - 10 - 30 x x   X 5 NiCrTi 26 15 1.4980 - 10 - 30 x x   heat resistant steels X 10 CrSi 6 1.4712 - 15 - 25 x x   X 10 CrAl 18 1.4742 - 15 - 25 x     X 15 CrNiSi 25 20 1.4841 - 15 - 25 x     stainless steels X 5 CrNi 18 10 1.4301 - 30 - 40 x x   X 6 CrNiMoTi 17 12 2 1.4571 - 30 - 40 x x   steel castings GS-38 1.0420 20 - 30 40 - 60   x   GS-60 1.0558 20 - 30 40 - 60   x   cast irons GG-15 0.6015 25 - 30 30 - 60 dry     GG-30 0.6030 25 - 30 30 - 60 dry     GGG-50 0.7050 25 - 30 30 - 60 dry     GTW-40-05 0.8040 25 - 30 30 - 60 dry     GTS-65-02 0.8165 25 - 30 30 - 60 dry     copper (Cu) KE-Cu 2.0050 100 - 250 100 - 400 x x   electrolyte-copper   100 - 250 100 - 400 x x   brass (copper-zinc alloys) CuZn 10 2.0230 100 - 300 100 - 400   x   CuZn 31 Si 1 2.0490 100 - 250 100 - 400   x   aluminium bronze (Cu-Al alloys) CuAl 8 2.0920 20 - 30 35 - 50   x   CuAl 10 Fe 3 Mn 2 2.0936 20 - 30 35 - 50   x   bronze (copper-tin Alloys) CuSn 6 2.1020 80 - 100 80 - 150   x   CuSn 6 Zn 6 2.1080 80 - 100 80 - 150   x   red brass (copper-cast alloys) G-CuSn 10 Zn 2.1086.01 30 - 40 50 - 100   x   G-CuSn 5 ZnPb 2.1096.01 30 - 40 50 - 100   x   nickel base alloys NiCr 20 TiAl 2.4631 - 10 - 25 x x   NiCr 22 FeMo 2.4972 - 10 - 25 x x   aluminium and alloys Al 99.5 3.0255.07 80 - 300 80 - 800   x   AlMgSiPb 3.0615.71 80 - 300 80 - 800   x   G-AlSi 5 Mg 3.2341.01 80 - 300 80 - 800   x   titanium alloys Ti 99.5 3.7024.1 - 10 - 20 x x   TiAl 6 V 4 3.7165 - 10 - 20 x x   thermoplastic plastics PVC   100 - 400 100 - 400 dry     Teflon, Hostalen   100 - 400 100 - 400 dry     plastics with fibre inlays Resitex   50 - 200 50 - 300 dry     Novotex   50 - 200 50 - 300 dry