... and O.E.M. stem (shaft) per your design drawing which is applied in the industriy.Steel Grade:42CrMo4,34CrNiMo6,C45,S355J2G3,16MnCr5 ... ,SAE8620,4130,4340, 39CrNiMo3,18CrNiMo7-6,and other grade according the customer. ... .We offer the Heat treatment of Normalized,Annealed,Quenched and Tempered for the Shaft.Ultrasonic Test:Sep1921 Class C/ ...