SAE4140 – BRIGHT BAR Grade Introduction:
SAE 4140 Alloy Steel Round Bars are cold drawn annealed steel of comparatively superior hardenability in the company of its chromium content that offers some excellent hardness infiltration, and the molybdenum imparts consistency of soaring potency and hardness. These SAE 4140 Alloy Cold Rolled Round Bars reacts well to heat-treatment and is quite simple to machine in the annealed state.
SAE4140 – BRIGHT BAR Equivalent grades:
USA |
Din |
BS |
BS |
Japan |
ASTM A29 |
DIN 1654 |
EN 10084 |
BS 970 |
JIS G4103 |
4140 |
1.6523/21NiCrMo2 |
1.6523/21NiCrMo2-2 |
805M20 |
SNCM220 |
SAE4140 – BRIGHT BAR Chemical composition:
The following table shows the chemical composition of SAE 4140 steel:
Standard |
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
ASTM A29 |
4140 |
0.38-0.43 |
0.15-0.35 |
0.75-1.00 |
0.035 |
0.040 |
0.8-1.10 |
0.15-0.25 |
EN 10250 |
42CrMo4 / 1.7224 |
0.38-0.45 |
0.4 |
0.6-0.9 |
0.035 |
0.035 |
0.9-1.2 |
0.15-0.30 |
JIS G4105 |
SCM 440 |
0.38-0.43 |
0.15-0.35 |
0.60-0.85 |
0.03 |
0.03 |
0.9-1.2 |
0.15-0.30 |