... 42CrMo4, 40CrNiMo, 34CrNi3Mo, 25Cr2Ni4MoV, 18CrNiMo5, 30CrMo, 4130,41405) Gear related forgings:35CrMo, 34CrMo4, 4137, 42CrMo, 4140, SCM440, 20CrMnMo ... from 160 tons till 4000 tons-Precision CNC machining centers for further machining process-Induction furnace for raw ... the form of the blank for machining5. Rough machining process6. Precision machining 7. Firstly treating the main face(basic surface ...