1.7225 QT steel
| Material No. | 1.7225 |
| US Standard (AISI) | 4137, 4140 |
| Abbreviation | 42CrMo4 |
| Older designation | - |
| Description | QT steel |
| Composition Alloy components [%] | C: 0.38 - 0.45 Si: ≤ 0.40 Mn: 0.60 - 0.90 P: ≤ 0.025 S: ≤ 0.035 Cr: 0.90 - 1.20 Mon: 0.15 - 0.30 |
| Density [g/cm³] | 7.9 |
Yield point | ≥ 650 |
| Tensile strength Rm [N/mm²] | 900 - 1100 |
| Elongation at fracture A [%] | ≥ 12 |
| Machinability | good |
| Weldability | unsuitable |
| Heat treatment | possible |
| Other properties | - |
| Main applications | Levelling sets, studs, spherical levelling washer, connecting rods, crankshafts, drive shafts, pinions, gear wheels |
Information for reference only; we do not assume any liability for its accuracy. Properties of steel materials are highly dependent on thermal and/or mechanical treatment.