4140 forged steel round bar 1)Strength to pull>=980(100)Mpa 2)Inspecting:ultrasonic test 3)Hardness<=229HB DescriptionAlloy steel /Round bars(SAE ... 4135/35CrMo steel )Grade35CrMo/AISI4135,4137/34CrMo4/JIS SCM432 SCRRM3/DIN 1.7220Chemical CompositionCSiMnCrMo0.32-0 ... .40.17-0.370.4-0.70.8-1.10.15-0.25StandardGB,JIS,ASTM,DIN,AISI,BSSizeThickness : 6mm ...