Black Surface Engineering Steel Bar 1.7225 SCM440 SAE4140 42CrMo4 EN19

Black Surface Engineering Steel Bar 1.7225 SCM440 SAE4140 42CrMo4 EN19

Hot Rolled 1.7225 SCM440 SAE4140 42CrMo4 Steel Round Bar Perform Standard: GB/T 3077-1999 C Si Mn Cr Mo P S Ni 0.38~0.45 0.17~0.37 0.60~0.90 0.90~1.20 0.15-0.25 ≤0.018 ≤0.030 ≤0.012 1, Application It ...