What is QU120 Crane Rail?
The QU120 rail belongs to the Chinese standard (YB/T 5055) series of crane rails, where "QU" stands for "crane" (derived from Chinese Pinyin "Qi Zhong Ji"). Among the standard series which includes QU70, QU80, QU100, and QU120, the QU120 is the heaviest and most robust profile available. It is designed with a wider head and a broader, thicker base compared to standard railway tracks, specifically tailored to distribute the immense concentrated wheel loads of heavy lifting equipment smoothly across the foundation.
As a leading manufacturer in the global railway and crane track industry, GNEE RAILWAY RAILWAY specializes in the mass production, customization, and distribution of premium QU120 crane rails.
QU120 Rail Specifications and Drawings
The QU120 rail is manufactured with strict tolerances to ensure seamless jointing and optimal wheel-to-rail contact. Below are the primary technical specifications:
| Parameter | Value | Notes |
|---|---|---|
| Rail height | 170 mm | Enhances longitudinal rigidity |
| Base width | 170 mm | Wide flat base ensures stability |
| Head width | 120 mm | Expands wheel-rail contact area |
| Web (waist) thickness | 44 mm | Improves impact resistance and bending performance |
| Theoretical mass | 118.1 kg/m | Weight matches strength requirements |
| Sectional area | 150.44 cm² | Optimized for load transmission |
| Standard length | 12 m (custom 4–12 m) | Adapts to on-site layout needs |
| Standard | YB/T5055-2014 (effective 2015) | Replaces the 1993 version |
Material Grades and Chemical Composition of QU120 Crane rail
The mechanical properties of the QU120 rail are directly determined by its material grade. Typically, this rail is rolled from high-quality U71Mn steel. The chemical composition is carefully balanced to achieve an optimal combination of high tensile strength and superior wear resistance.
| Category | Grade | C | Si | Mn | V | P (max) | S (max) | Standard |
| Carbon Structural Steel | Q235B | ≤0.20 | ≤0.35 | ≤1.40 | - | 0.045 | 0.045 | GB/T700-2016 |
| Q275B | ≤0.22 | ≤0.35 | ≤1.50 | - | 0.045 | 0.045 | GB/T700-2016 | |
| Low Alloy Structural Steel | Q355B | ≤0.20 | ≤0.50 | ≤1.70 | - | 0.035 | 0.035 | GB/T1591-2018 |
| Light Rail Steel | 50Q | 0.40-0.60 | 0.15-0.35 | ≥0.40 | - | 0.04 | 0.04 | GB/T11264-2012 |
| 55Q | 0.50-0.60 | 0.15-0.35 | ≥0.60 | - | 0.04 | 0.04 | GB/T11264-2012 | |
| 50SiMnP | 0.45-0.58 | 0.50-0.80 | 0.60-1.00 | - | 0.12 | 0.04 | - | |
| Heavy Rail Steel | U77MnCr | 0.72-0.82 | 0.10-0.50 | 0.80-1.10 | - | 0.025 | 0.025 | TB/T2344-2020 |
| U71Mn | 0.65-0.76 | 0.15-0.35 | 1.10-1.40 | - | 0.03 | 0.03 | GB/T2585-2021 | |
| U75V | 0.71-0.80 | 0.50-0.80 | 0.70-1.05 | 0.04-0.12 | 0.03 | 0.03 | - | |
| 900A | 0.60-0.80 | 0.08-0.60 | 0.80-1.30 | - | 0.04 | 0.04 | UIC860-O | |
| R260 | 0.60-0.80 | 0.13-0.60 | 0.65-1.25 | - | 0.03 | 0.03 | EN13671-1:2011+A1:2017 |
Backed by advanced manufacturing facilities and a robust production capacity, GNEE RAILWAY RAILWAY offer unparalleled advantages in dimensional accuracy, metallurgical stability, and comprehensive track solutions. Whether your project requires standard lengths or highly customized processing, GNEE RAILWAY RAILWAY ensures every single rail meets rigorous international standards, delivering unmatched reliability, durability, and safety to our clients worldwide.
If you have special requirements for dimensions or higher strength materials, please contact us for special custom production.