4140 Steel
Low-alloy chrome-molybdenum steel, known for its excellent balance of mechanical strength, toughness and hardenability. It is generally supplied quenched and tempered, ready to machine and use in components subject to high loads, impact and repetitive stress. It is one of the most widely used machinery grade steels for making axles, shafts, gears, crankshafts, spindles, pins and high-strength fasteners.
| SAE / AISI | EN | DIN | JIS |
|---|---|---|---|
| 4140 | 42CrMo4 | 1.7225 | SCM440 |
| % | C | Si | Mn | Cr | Mo | P | S |
|---|---|---|---|---|---|---|---|
| Min | 0.38 | 0.15 | 0.75 | 0.80 | 0.15 | — | — |
| Max | 0.43 | 0.35 | 1.00 | 1.10 | 0.25 | 0.035 | 0.040 |
Hot forgedQuenched and tempered
Hot rolledQuenched and tempered
Plates1/2" – 10"13 mm – 254 mm
Round bars1/2" – 24"13 mm – 610 mm- Drive shafts
- Industrial shafts
- Machinery gears
- Crankshafts
- Automotive connecting rods
- Industrial spindles
- High-strength fasteners
- Industrial bolts
- Torsion bars
Note: The information and values in this data sheet are provided for reference only and may vary depending on manufacturing, treatment and application conditions. They do not constitute guaranteed specifications, so use and interpretation of this data is the user's responsibility.
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