AISI SAE 4140 and DIN 42CrMo4 all is Alloy engineering structure steel. Their chemical composition and Mechanical properties is very same. main application to oil engineering system
Grade number|AISI: 4140
Grade number|SAE: 4140
Grade number|UNS: G41400
C(％): 0.38～0.43
Si(％): 0.15～0.35
Mn(％): 0.75～1.00
P(％)≤: 0.035
S(％)≤: 0.040
Cr(％): 0.80～1.10
Mo(％): 0.15～0.25
Grade number: 42CrMo4
Grade number:W-Nr.: 1.7225
C(％): 0.38～0.45
Si(％): ≤0.40
Mn(％): 0.60～0.90
P(％)≤: 0.035
S(％)≤: 0.035
Cr(％): 0.90～1.20
Mo(％): 0.15～0.30
