The EN 10083-2 standard specifies the technical delivery conditions for quenched and tempered alloy steels used in high-stress mechanical components. These premium-quality steels combine precise chemical composition with controlled heat treatment to achieve superior mechanical properties.
Key Steel Grades Under EN 10083-2
1. Chromium Steels
- 41Cr4 (1.7035) – General-purpose Cr steel for gears and shafts
- 25CrMo4 (1.7218) – Medium-carbon Cr-Mo alloy for high-toughness parts
2. Chromium-Molybdenum Steels
- 42CrMo4 (1.7225) – Premium engineering steel for heavy-duty components
- 34CrMo4 (1.7220) – High-strength steel for pressure vessels
3. Nickel-Chromium-Molybdenum Steels
- 36CrNiMo4 (1.6511) – High-performance steel for critical applications
- 34CrNiMo6 (1.6582) – Aerospace-grade alloy for landing gear components
4. Manganese Steels
- 38Mn6 (1.1127) – Cost-effective alternative to Cr-Mo steels
Technical Highlights
Chemical Composition Requirements
| Element | 25CrMo4 | 42CrMo4 | 34CrNiMo6 |
|---|---|---|---|
| C | 0.22-0.29% | 0.38-0.45% | 0.30-0.38% |
| Cr | 0.90-1.20% | 0.90-1.20% | 1.30-1.70% |
| Mo | 0.15-0.30% | 0.15-0.30% | 0.15-0.30% |
Mechanical Properties (After QT)
- Tensile Strength: 700-1200 MPa
- Yield Strength: 550-1000 MPa
- Impact Energy: ≥40J at -20°C to +20°C
Typical Applications
✔ Automotive: Crankshafts (42CrMo4), transmission gears (34CrNiMo6)
✔ Energy: Turbine shafts (36CrNiMo4), drill collars (34CrMo4)
✔ Heavy Equipment: Hydraulic cylinders, bearing components
✔ Tooling: Large dies, press components
Why Specify EN 10083-2 Steels?
◉ Controlled Hardenability – Guaranteed through chemical composition limits
◉ Heat Treatment Ready – Optimized for quenching and tempering processes
◉ Traceability – Full material documentation available
◉ European Standardization – Harmonized with ISO 683-18 and DIN standards
For EN 10083-2 material certificates or technical consultation, contact our metallurgy team.