4340 vs 4140

4340 VS 4140 different of chemical

C Si Mn S P  Cr Mo  Ni
4340 0.38-0.43 0.15-0.35 0.60-0.80 ≤0.040 ≤0.035 0.70-0.90 0.20-0.30 1.65-2.00

 

C Si Mn S P  Cr Mo  Ni
4140 0.38-0.43 0.15-0.35 0.75-1.00 ≤0.040 ≤0.035 0.80-1.10 0.15-0.25 /

4340 vs 4140