Which type of steel is used in the manufacture of rails?
Jan 22, 2026
A steel rail is a precision-rolled steel component designed to carry rolling wheels, transferring vertical, lateral, and dynamic forces to sleepers and the track bed while maintaining smooth wheel guidance. Its cross-section, metallurgical composition, and surface treatment are engineered to balance hardness, toughness, and fatigue resistance, ensuring long-term dimensional stability and minimal wear under continuous traffic loads.
Which type of steel is used in the manufacture of rails?
Rails are made from specialized steel grades formulated to meet load, wear, and environmental demands. The most commonly used types include:
- U71Mn: A high-manganese carbon steel widely used for crane rails and heavy-duty industrial tracks. It combines toughness with excellent wear resistance under concentrated wheel loads.
- U75V: High-strength alloy steel intended for high-speed lines and heavy mainline freight rails. Its elevated tensile strength and fatigue resistance make it suitable for high-speed, high-load applications.
- 50Mn: Medium-carbon manganese steel used in mining, industrial sidings, and medium-load tracks. It offers a balance of hardness and ductility, resisting both wear and brittle fracture.
- Q235B: Structural carbon steel applied for light rails, temporary tracks, or low-load systems. It provides adequate mechanical performance at lower cost but has less wear resistance.
- R260 / R350HT: Heat-treated, high-quality European and Asian steel grades for mainline rails. These materials deliver superior fatigue resistance, toughness, and hardness for long-term high-speed operation.
| Grade | Standard / Region | Typical Composition (wt%) | Key Features & Applications |
| R260 | EN 13674-1 (Europe) | C: 0.67–0.80, Mn: 0.90–1.20, Si: ≤0.50 | Base-grade rail; cold-rolled; widely used on medium-traffic lines. Good weldability and cost efficiency. |
| R350HT | EN 13674-1 (Europe) | C: 0.75–0.85, Mn: 0.80–1.20, Cr: 0.20–0.50 | Heat-treated (online/offline); UTS ≥1100 MPa; 30–50% longer life than R260. Standard for high-speed (TGV, ICE) and heavy-haul lines. |
| Grade 260 | AREMA (North America) | C: ~0.77, Mn: ~1.0–1.2, Si: ~0.2 | Equivalent to R260; used with rail sections like 115RE, 136RE. Common on Class I freight networks. |
| Grade 350 | AREMA + Mill Specs (USA/Canada) | C: 0.78–0.83, Mn: 0.90–1.20, Cr: 0.2–0.6, + V/Nb (microalloyed) | TMCP or heat-treated; UTS ~1180–1280 MPa. For demanding curves, heavy axle loads (>33 ton), and high-tonnage corridors. |
| BH Rail (Bainitic) | JIS E 1101 (Japan), adopted in EU/India | C: 0.65–0.80, Mn: 1.0–1.4, Cr/Mo/Ni (optional, mill-specific) | Bainitic microstructure; high strength (UTS ~1250–1350 MPa) + superior fracture toughness. Used on Shinkansen curves and high-wear segments. |
| U71Mn | GB/T 2585 (China) | C: 0.65–0.77, Mn: 1.10–1.40, Si: 0.15–0.35 | Work-hardening carbon-manganese rail; standard for 50kg/m, 60kg/m rails on Chinese mainlines. Comparable to R260/R350 in performance. |
| U75V | GB/T 2585 (China) | C: 0.67–0.77, Mn: 0.70–1.00, V: 0.04–0.12 | Vanadium-microalloyed; higher strength & fatigue resistance than U71Mn. For high-speed (e.g., Beijing–Shanghai HSR) and heavy-haul lines. |
The selection of steel type depends on expected load, traffic frequency, environmental exposure, and service life requirements. For instance, crane and industrial rails prioritize high hardness and toughness, while high-speed train rails emphasize fatigue resistance and dimensional stability.
Types of Steel Track Rail from GNEE RAIL
GNEE RAIL offers all these steel types in a wide range of profiles and standards, including QU crane rails, DIN industrial rails, UIC mainline rails, and custom specifications.
| 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 | |
| GB 2585-2007 | 50kg/m | U71Mn |
| 60kg/m | U75V | |
| 75kg/m | ||
| TB/T2344-2012 | 50kg/m | U71Mn,U75V,U77MnCr |
| 60kg/m | U78CrV | |
| 75kg/m | ||
| GB 11264-1989 | 8kg/m | Q235 |
| 12kg/m | Q235 | |
| 15kg/m | 55Q, Q235 | |
| 18kg/m | 55Q, Q235 | |
| 22kg/m | 55Q, Q235 | |
| 24kg/m | 55Q, Q235 | |
| 30kg/m | 55Q, Q235 | |
| 38kg/m | 50Mn, U71Mn | |
| 43kg/m | 50Mn, U71Mn | |
| GB Crane rails | QU70 | U71Mn |
| QU80 | U71Mn | |
| QU100 | U71Mn | |
| QU120 | U71Mn |
Why use different materials to manufacture steel rails?
Different rail applications impose varying mechanical and environmental demands, making it essential to select the steel material that matches performance requirements. Several factors drive the choice of material:
- Load and Stress Requirements: Rails experience highly concentrated stresses under wheels. Heavy freight or crane rails require high-strength, wear-resistant steels such as U71Mn or U75V to prevent head deformation and excessive wear. Lighter rails for urban transit or yard tracks can use 50Mn or Q235B, which provide adequate strength at lower cost.
| Q235B | Mechanical property | Chemical composition(%) | |||||||||
| Yield strength | Tensile strength | Elongation | Hardness | C | Si | Mn | S | P | |||
| MPa | kg/mm² | MPa | kg/mm² | min | HB | ≤ | ≤ | ≤ | |||
| ≥ | ≥ | ||||||||||
| 235 | 24 | 375-460 | 38-47 | 26% | 0.12-0.22 | 0.35 | 0.30-0.70 | 0.045 | 0.045 | ||
- Traffic Frequency and Fatigue Resistance: High-speed and high-cycle rail lines accumulate millions of wheel passes. Steels with superior fatigue resistance, like R350HT or U75V, are used to reduce the risk of crack formation and prolong rail life. Lower-speed, low-cycle lines can tolerate medium-carbon steels.
- Environmental Adaptation: Rails in coastal, humid, or chemically aggressive regions face accelerated corrosion, while rails in cold climates risk brittle fracture. Different steel compositions, alloying elements, and heat treatments allow manufacturers to optimize toughness, hardness, and corrosion resistance for specific environments.
- Impact and Abrasion Conditions: Industrial, mining, or crane rails experience frequent impacts and lateral loads. Steels with higher manganese and controlled carbon content, such as 50Mn, provide a balance between hardness and toughness, preventing cracking or spalling under repeated impact.
- Compatibility with Track System: Rail material interacts with fasteners, sleepers, and pads. Higher-strength rails need fastening systems that can maintain elastic restraint without introducing stress concentrations. Material selection ensures the entire track system functions harmoniously.
- Economic Considerations: Higher-grade steels have higher initial costs but reduce maintenance frequency, rail grinding, and replacement intervals. Selecting the appropriate material ensures long-term lifecycle cost optimization.
Since 2008, GNEE RAIL has been supplying steel rails of different grades for more than 18 years, steel rails from GNEE is highly recommened in China and abroad.Wtih cutting edge equipment, GNEE produces high quality steel rails that meet with requirements of most countries. Standard rail, head hardened rail, heavy rail,light rail,crane rail and other types are all available here, as one of the China main rail supplier, GNEE RAIL has been working on supplying economical green railway products all over the world.
