In addition to its wide range of applications in the automotive, agriculture, and defense industries, SAE 4140 alloy steel grade is utilized extensively as forgings in the aerospace and oil & gas sectors. Forged gears and shafts, fixtures, jigs, collars, and spindles are typical applications.
Contact UsThe following table shows the chemical composition of SAE 4140 steel:
| Standard | Grade | C | Mn | P | S | Si | Cr | Mo |
|---|---|---|---|---|---|---|---|---|
| ASTM A29 | 4140 | 0.38-0.43 | 0.75-1.00 | 0.035 | 0.040 | 0.15-0.35 | 0.8-1.10 | 0.15-0.25 |
| EN 10250 | 42CrMo4 /1.7224 | 0.38-0.45 | 0.6-0.9 | 0.035 | 0.035 | 0.4 | 0.9-1.2 | 0.15-0.30 |
| JIS G4105 | SCM440 | 0.38-0.43 | 0.60-0.85 | 0.03 | 0.03 | 0.15-0.35 | 0.9-1.2 | 0.15-0.30 |
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