| Product Name | 6C Marine Crankshaft |
| Displacement | 40L |
| Weight | 550Kg |
| Strengthening Process | Groove rounding rolling + journal quenching |
| Advantages | Weight: 10% lighter than forged steel; Cost: 15% lower than forged steel |
Material: QT900-6
| QT900-6 | |||||
| Chemical composition | C | Si | Mn | P | S |
| 3.0%-4.0% | 1.8%-3.0% | ≤0.5% | ≤0.1% | ≤0.1% | |
| Physical properties | Density | Tensile strength | Yield strength | Elongation | Hardness |
| 7.0-7.3g/cm³ | 900MPa | 600MPa | ≥6% | 270-330HB | |
