STANDARD CUT TING CONDITIONS ISO Workpiece material Hardness Chipbreaker Priority Recomended Cutting speedgradeVc (m/min) < 300 HB DGS First choice AH7025, AH725 50 - 180 < 300 HB DGM Priority for wear resistance T9125 80 - 200 Steels S45C, SCM435, etc. < 300 HB DGS Priority for fracture resistance GH130 50 - 120 C45, 34CrMo4, etc. < 300 HB DGS Priority for surface finish NS9530 80 - 220 < 300 HB DGL For mild steel Chip control AH7025 50 - 180 Stainless steels < 200 HB DGS First choice GH130 50 - 120 SUS303, etc. X10CrNiS18-9, etc. < 200 HB DGM Priority for impact resistance AH7025, AH725 50 - 120 Grey cast irons FC250, etc. - DGM First choice GH130 50 - 180 250, etc. Ductile cast irons FC250, etc. - DGM First choice GH130 50 - 120 450-10S, etc. External Aluminium alloysSi < 12% - DGG First choice TH10 100 - 500 Internal Titanium alloys < HRC 40 DGM First choice AH905 20 - 80 Ti-6Al-4V, etc. < HRC 40 DGS Priority for fracture resistance AH7025, AH725 20 - 80 Grooving Hardened steels SCM435, etc. > HRC 50 DGN First choice BX360 80 - 150 34CrMo4, etc. Threading Parting-off Referent pages : Toolhoders → G101 - G102 G110 www.tungaloy.com