34CrNiMo6 (EN 1.6582) is a high-strength alloy steel known for excellent toughness and fatigue resistance. It is widely used in heavy-duty mechanical components requiring high load-bearing capacity.
34CrNiMo6
High-strength alloy bar for heavy-duty shafts and fatigue-critical parts.
34CrNiMo6 is known for excellent toughness and fatigue resistance, making it a practical choice for very demanding mechanical parts.

Key pointBuilt for high load-bearing capacity and reliable service.
Well suited to large shafts, gear shafts, and heavy machinery.
Product Summary
High-strength alloy steel for demanding industrial machinery.
The normalized content keeps the same technical intent as the source note while presenting it in a buyer-friendly format.
| EN | 34CrNiMo6 / 1.6582 |
|---|---|
| ASTM | 4340 |
| GB | 34CrNiMo6 |
| C | 0.30 - 0.38 |
|---|---|
| Si | 0.15 - 0.40 |
| Mn | 0.50 - 0.80 |
| Cr | 1.30 - 1.70 |
| Ni | 1.30 - 1.70 |
| Mo | 0.15 - 0.30 |
| Tensile strength | 900 - 1100 MPa |
|---|---|
| Yield strength | ≥ 750 MPa |
| Diameter | 20 - 400 mm |
|---|---|
| Length | 3 - 12 m |
| Condition | QT |
- Heavy duty shafts
- Gear shafts
- Oil & gas equipment
- Mining machinery components
- QT delivery support
- Forged or hot rolled supply
- Rough machining and precision machining
- Surface treatment on request
- Chemical analysis
- Mechanical testing
- UT inspection
- Dimensional review
Inquiry
Need 34CrNiMo6 for a heavy-duty project?
Send your part type and target condition and we will match the supply route.
