50kg Rail
Product Overview
Gloryrail strictly complies with GB/T 2585-2017 Hot-Rolled Rails for Railway Applications to deliver high-performance 50kg rails, engineered as the core material for global heavy-haul transportation. Manufactured via hot-rolling and optional heat treatment, its reinforced cross-section (152mm height, 132mm base width) ensures exceptional resistance to bending and fatigue. With a theoretical weight of 50.514kg/m and standard lengths of 6/24 meters (customizable).
Key features
GB Heavy Rail Standard Compliance
Rail height tolerance: ±0.6mm; length tolerance for fixed lengths: ±20mm
Bolt hole positioning accuracy: ≤0.5mm, ensuring seamless compatibility with national railway accessories (fishplates, fasteners).
Defect-free surface (no cracks/folds); hardness uniformity on the rail head tread ≤5HBW, satisfying wheel-rail contact mechanics for high-speed trains and heavy freight.
Superior Material Performance
U71Mn High-Carbon Steel (Standard)
Tensile strength ≥880MPa; Brinell hardness 260–300HBW.
Normalized pearlitic structure improves fatigue crack resistance by 20% vs. common carbon steel.
Advanced Surface Strengthening
Rail Head Quenching (Optional)
Medium-frequency induction quenching forms a hardened layer (depth ≥20mm) with hardness ≥350HBW in the top 30mm of the rail head, extending service life for lines.
Composite Anti-Corrosion Coating
Applications
National Mainlines & High-Speed Freight
Mixed Passenger-Freight Railways: U71Mn supports traffic loads, with lower laying cost than other foreign rails.
High-Speed Freight Lines: Quenched rail heads reduce wheel rolling resistance, enabling high speeds with lower energy consumption.
Heavy-Haul Mining Transport
Long-Distance Open-Pit Mine Lines
Large Underground Mine Roads: Wide base design minimizes track subsidence in deformable roadways.
Ports & Logistics Hubs
Deepwater Port Rail Lines: Composite-coated rails last more longer, 3x longer than traditional coatings.
Logistics Park Circular Railways: Supports 50-ton forklift frequent turning, with hardened heads reducing metal plastic deformation.
Industrial & Special Railways
Military Dedicated Lines
Material Composition:
…………………………………………………………………………………………………| 50Mn | 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 | ≤ | ≤ | ≤ | ≤ | ≤ | ||||
| ≥390 | ≥40 | ≥645 | ≥66 | 13% | 0.48-0.56 | 0.17-0.37 | 0.70-1.00 | 0.035 | 0.035 | 0.25 | 0.25 | 0.25 | ||
| 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 | |||||
Why Choose Gloryrail?
As a leading Supplier in China, we use localized manufacturing expertise to offer competitive pricing and rapid delivery. Our GB 50kg rail is trusted globally for its consistent quality, safety, and we have more than 15 years experience focused on steel rails.
Explore our full range of steel rails solutions and request a quote today. Partner with us for reliable, high-performance rails that drive efficiency in your operations.