... 4340 2.steel round bar 3.steel bar 4.bar 1.Alloy Steel Round Bar 43402.steel round bar3.steel bar4 ... .bara.Alloy steel 34CrNiMo6 (4340 / 1.6582), 4140,8620,52100,D2,M2,T1,O1,D3,L6 ... tempered, turned.3.Analysis (% by weight)CSiMnPSCrMoNiVW0.300.100.40Max.Max.1.400.151.400.380.400.700.0300.0301.700.351 ...