QU80 Rail Dimensions (YB/T 5055-2014)
The standardized cross-section of QU80 rail ensures compatibility with mainstream crane wheel systems and stable performance under repeated loading.
| Type of Rail | Standard | Dimensions mm | Steel Grade | Mass M |
| Height | Base Width | Head Width | Web Thickness | kg/m |
| QU80 RAIL | YB/T 5055-2014 | 130 | 130 | 80 | 32 | U71Mn | 63.69 |
Rail Length Options:
Standard length: 12 m(Custom cut lengths available upon request)
Detailed dimension drawings and tolerance data are available upon request for engineering evaluation.
QU80 Crane Rail Steel Grade
QU80 crane rail is manufactured from U71Mn manganese steel, a material widely used for crane and heavy-duty rail applications.
| U71Mn | Mechanical Property | Chemical Composition |
| Yield strength | Tensile strength | Elongation | Hardness | C | Si | Mn | S | P | Cr | Ni | Cu |
| MPa | kg/mm² | MPa | kg/mm² | min | HB | ≤ | ≤ | ≤ | ≤ | ≤ |
| | | ≥880 | | 9% | | 0.65-0.76 | 0.15-0.35 | 1.10-1.40 | 0.030 | 0.030 | 0.25 | 0.25 | 0.25 |
Material advantages include:
- High surface wear resistance under concentrated crane wheel loads
- Excellent impact toughness for frequent start-stop and reversing operations
- Stable fatigue performance under long-term cyclic stress
- Good adaptability to harsh industrial environments
Combined with controlled hot rolling and precision finishing, U71Mn steel ensures consistent rail geometry, smooth wheel contact, and extended service life.