... , 39NiCrMo3 4130, 4340, 42CrMo4V, and so on Commodity: forged shaft 1.Material: alloy steel ,carbon steel ,stainless steel . ... 1921 Group III C/c or D/d3.Delivery condition: forged + finish machined, annealed, normalized, quenched & tempered, etc. ... , petrochemical plant, auto-power, wind-engine, metallurgical machinery, precision tools, etc. 9.Size: accordong to customer request.10.Manufacture ...