What is the U71Mn rail specification?
Jan 20, 2026
Steel rails are critical components in industrial transport systems, warehouse crane tracks, and logistics networks. They provide stable guidance for wheeled vehicles, bear dynamic and static loads, and maintain precise alignment under continuous operation. High-quality steel rails combine strength, toughness, and wear resistance to ensure long-term reliability, reduce maintenance, and support heavy or repetitive industrial operations. Proper rail selection is essential for factories, ports, warehouses, and temporary transport lines to guarantee safety and efficiency.
Among different rail grades, U71Mn has become a preferred choice for industrial crane rails and heavy-duty transport lines due to its combination of high strength, wear resistance, and impact toughness.
What is the U71Mn rail specification?
U71Mn rails are designed to provide excellent performance under heavy loading and repetitive stress conditions.
| Property | U71Mn | Unit | Notes |
|---|---|---|---|
| Yield Strength | ≥380 | MPa | Supports dynamic loads in crane operations |
| Tensile Strength | 880–1080 | MPa | Resists fracture under peak stress |
| Hardness | 350–450 | HB | Provides high wear resistance |
| Elongation | ≥12% | % | Balances toughness and strength |
| Carbon | 0.63–0.73 | % | High-strength low-alloy content |
| Manganese | 1.35–1.65 | % | Improves wear resistance and toughness |
U71Mn rails are particularly suitable for heavy industrial cranes, port operations, and high-duty logistics lines, where wear resistance and impact toughness are critical for long-term operation.
Which Standards and Profiles Are Associated With U71Mn Rails?
U71Mn rails are manufactured according to Chinese GB/T 2585-2007 standards and can be supplied in multiple industrial rail profiles for domestic and international use:
- Rail weights: 50kg/m, 60kg/m, 75kg/m, depending on operational load and crane type
- Rail heights: Typically 150mm, 160mm, 180mm, adjusted to specific installations
- Custom lengths: Supplied according to project requirements, with options for pre-drilled ends or curved sections
| Classification | Height(mm) | Head (mm) | Bottom (mm) | Thick(mm) | Weight (kg/m) | |
| Light Rail | 8 KG/M | 65 | 25 | 54 | 7 | 8.42 |
| 9 KG/M | 63.5 | 32.1 | 63.5 | 5.9 | 8.94 | |
| 12 KG/M | 69.85 | 38.1 | 69.85 | 7.54 | 12.2 | |
| 15 KG/M | 79.37 | 42.86 | 79.37 | 8.33 | 15.2 | |
| 18 KG/M | 80 | 40 | 80 | 10 | 18.06 | |
| 22 KG/M | 93.66 | 50.8 | 93.66 | 10.72 | 22.3 | |
| 24 KG/M | 107 | 51 | 90 | 10.9 | 24.46 | |
| 30 KG/M | 107.95 | 60.33 | 107.95 | 12.3 | 30.1 | |
| Heavy Rail | 38 KG/M | 134 | 68 | 114 | 13 | 38.733 |
| 43 KG/M | 140 | 70 | 114 | 14.5 | 44.653 | |
| 45 KG/M | 145 | 67 | 126 | 14.5 | 45.546 | |
| 50 KG/M | 152 | 70 | 132 | 15.5 | 51.514 | |
| 60 KG/M | 176 | 73 | 150 | 16.5 | 60.64 | |
U71Mn rails can also be adapted to meet DIN, EN, or JIS profile equivalents, allowing international projects to benefit from the steel's mechanical properties while complying with local standards.
| Standard | Sepc. | Material Typical Grade |
| UIC860 | UIC54 | 700,900A,900B |
| UIC60 | ||
| EN13674.1 | 5.00E+02 | R200,R350HT,R260Mn,R35LHT,R320Cr,R370CrHT |
| 5.40E+02 | ||
| 6.00E+02 | ||
| 6.00E+03 | ||
| BS-11-1985 | BS80A | 700,900A,900B |
| BS90A | ||
| BS100A | ||
| AREMA | 115RE | SS,HH,LA,IH |
| 136RE | ||
| ASCE60 | U71Mn | |
| ASCE85 | U71Mn |
As a professional rail fastener supplier, GNEE RAIL can provide different standard steel rail such as GB,American, BS, UIC, DIN, JIS, Australian and South Africa which used in railway lines, cranes and coal mining.
