Wholesale Factory Price Q235/55Q Quality Guaranteed Railway Heavy/light Steel Rail for Subway Used
ZCXH
Shandong, China
17-24days
1000 tons/ month
Our wholesale factory-priced Q235/55Q railway steel rails, available in heavy and light variants, are specially designed for subway systems with guaranteed quality. Crafted from premium Q235 and 55Q steels, they deliver exceptional strength, wear resistance, and load-bearing capacity, ensuring safe and stable operation of subway trains. The rails undergo strict quality control to meet rigorous railway standards, offering reliable performance even under continuous heavy loads. With precise dimensions and smooth surfaces, they minimize friction and noise, enhancing passenger comfort. Available at factory-direct wholesale prices, these rails balance cost-effectiveness with durability, making them an ideal choice for subway infrastructure projects requiring long-term reliability.
Heavy/Light Rail Specifications: Adapted to Subway Load & Space
Subway systems (with varying train axle loads and tunnel space constraints) require flexible rail sizing—heavy and light rail options meet these diverse needs:
1. Heavy Steel Rails (Typical Model: 50kg/m, 60kg/m)
Load-Bearing Capacity: Designed for high-axle-load subway trains (e.g., 16-20t axle load, common in large-city subways like Beijing/Shanghai). The thick rail web (15-18mm) and large head area (≥650 mm²) distribute train weight evenly, reducing track deformation.
Wear Resistance Optimization: 55Q heavy rails undergo quenching & tempering (heat treatment) on the rail head—hardening the contact surface to HB 280-320, extending wear life to 8-10 years (vs. 5-6 years for unquenched rails).
Application: Main subway lines with high passenger flow (e.g., peak-hour trains every 2-3 minutes) and heavy trains (8-10 carriages).
Space-Saving Design: Thinner rail web (10-13mm) and smaller cross-section—critical for narrow subway tunnels (e.g., old urban subway lines with limited tunnel diameter) or light-duty lines (e.g., suburban subway branches with 4-6 carriage trains).
Lightweight & Easy Installation: 30kg/m rails weigh ~40% less than 60kg/m heavy rails, reducing lifting equipment requirements during tunnel construction (subway tunnels have limited overhead space for cranes).
Application: Light-duty subway lines, subway yards (train maintenance/storage areas with lower axle loads), or auxiliary tracks (e.g., connecting subway stations to depots).
Subway-Specific Performance Optimization
Rails for subway use are not just "standard steel rails"—they undergo targeted upgrades to address subway operations’ unique challenges:
Low Noise & Vibration: Subway tunnels amplify noise and vibration (impacting nearby residents). Q235/55Q rails are paired with high-damping rail pads (made of rubber or composite materials) during installation, and 55Q main rails have a slightly rounded rail head (reducing wheel-rail impact noise by 3-5 dB).
Corrosion Resistance for Tunnel Environments: Subway tunnels are humid (relative humidity ≥80%) and prone to condensation, which accelerates rail rust. 55Q heavy rails are treated with hot-dip galvanizing or epoxy coating on non-contact surfaces (rail web/foot), while Q235 accessories use zinc plating—extending corrosion resistance to 15+ years (vs. 8-10 years for uncoated rails).
Precision Dimensional Tolerance: Subway trains require ultra-stable tracks (even minor rail misalignment can cause derailment risks). Both heavy/light rails meet GB/T 2585-2017 (China’s railway rail standard) dimensional requirements:
Rail height tolerance: ±0.5mm;
Rail head width tolerance: ±0.3mm;
Straightness error: ≤0.5mm/m. This ensures smooth train operation (reducing wheel wear and passenger discomfort from jolts).
