Gnee Rails’ QU120 crane rails are military-grade and have become the common choice of heavy industry around the world. We offer dual material options of U71Mn and U75V. The wear resistance of QU120 rails is twice that of ordinary rails. The 120mm ultra-wide rail head and thickened rail waist design greatly improve the impact resistance, can carry a single wheel load of ≥150 tons, and extend the service life of the rails. Suitable for metallurgical and port cranes, customized galvanized layer thickness ≥80μm, salt spray test passed 1000 hours.
As a high-quality crane rail supplier, Gnee’s QU120 rails have won the trust of global customers with excellent corrosion resistance, wear resistance and cost-effectiveness. We provide customized solutions for size, performance, and surface treatment methods, and provide discounts for bulk orders.
| Type | QU120 crane rail, Steel rail, Crane rail |
|---|---|
| Standard | Chinese Standard YB/T5055-93 |
| Materials | U71Mn, U75V |
Model | Section size (mm) | Section size(x.1) | Typical length(n) | Theoretical weight(kz/m) | Material | |||
Rail height | Base width | Head width | Web thickness | |||||
120kg | 170 | 170 | 120 | 44 | 150.44 | 12 | 118.5 | U71MN U75V |
Other Crane Rail Models:
Model | Section size (mm) | Section size(x.1) | Typical length(n) | Theoretical weight(kz/m) | Material | |||
Rail height | Base width | Head width | Web thickness | |||||
70kg | 120 | 120 | 70 | 28 | 67.30 | 12 | 52.77 | U71MN U75V
|
80kg | 130 | 130 | 80 | 32 | 81.13 | 12 | 64.41 | |
100kg | 150 | 150 | 100 | 38 | 113.32 | 12 | 89.05 | |
QU120 rails are a type of crane-specific rails (codenamed “QU”), which are super-heavy special-section rails. They are named because the rail head width is 120mm (“120” refers to the rail head width size, unit: mm). It is a high-end rail designed for super-heavy cranes above 200 tons, in line with China’s GB/T 3426 standard.
QU120 rails are suitable for heavy-duty working conditions, such as continuous casting workshops in steel plants, large gantry cranes in ports, and dam top gantry cranes in hydropower stations. Compared with QU100 rails, QU120 rail has a vertical stiffness increase of about 30%, a higher bending section modulus, and can effectively reduce plastic deformation under long-term heavy loads. Its rail head hardening treatment can effectively extend its service life.
Gnee provides full-model GB standard crane rails and matching fasteners, such as crane rail clips.
| Comparison Dimension | U71Mn | U75V |
| Chemical Composition | C: 0.65-0.77%, Si: 0.15-0.35%, Mn: 1.00-1.40% | C: 0.71-0.80%, Si: 0.50-0.70%, V: 0.04-0.12% |
| Mechanical Properties | Tensile strength ≥880MPa, hardness HB 260-300 | Tensile strength ≥980MPa, hardness HB 280-320 |
| Abrasion Resistance | Moderate abrasion resistance, suitable for medium-low load scenarios | High abrasion resistance, especially superior in small-radius curve sections, service life extended by over 2 times compared to U71Mn |
| Toughness & Impact Energy | Average impact energy: rail head 15.65J, rail base 19.57J (better than U75V) | Average impact energy: rail head 14J, rail base 16.28J (slightly lower than U71Mn) |
| Weldability | Welded joint strength is close to base metal, but post-weld normalizing treatment is required to improve toughness | Good weldability, reduced risk of brittle fracture through chemical composition adjustment, but post-weld heat treatment process must be noted |
| Cost & Cost-Effectiveness | Lower cost, suitable for projects with limited budgets or lighter loads | Price 6%-10% higher than U71Mn, but longer service life and lower maintenance costs offer better long-term economic efficiency |
| Typical Application Scenarios | Yard lines, medium and small cranes, lines with low annual gross traffic | Main lines, heavy-duty cranes (e.g., QU120), high-frequency heavy-load scenarios (e.g., steel mill continuous casting workshops, port gantry cranes) |
| Type | QU120 crane rail, Steel rail, Crane rail |
|---|---|
| Standard | Chinese Standard YB/T5055-93 |
| Materials | U71Mn, U75V |
The following are frequently asked questions about QU120 track. If you have other questions, please feel free to contact us.
Heavy industry scenarios: continuous casting workshops in steel plants, hot rolling line cranes (lifting ladles and billets);
Port machinery: shore container cranes (quay cranes), tire-type yard cranes (RTGs);
Large projects: nuclear power equipment hoisting, heavy machinery manufacturing workshops.
The standard length is 12.5m or 25m, and common specifications are in stock; special lengths (such as extra-long rails) or surface heat treatment requirements require customization, and the delivery cycle is usually 4-8 weeks.
Size difference: QU120 rail head width is 120mm (QU100 is 100mm, QU80 is 80mm), and rail height, bottom width and other parameters are also larger (such as QU120 rail height 150mm, bottom width 120mm).
Load capacity: QU120 is suitable for super heavy cranes with wheel load ≥300 tons, QU100/QU80 is suitable for medium and heavy cranes (100-300 tons)
High temperature scenarios (such as metallurgical workshops, long-term 50-100℃): U75V material has excellent heat softening resistance and can be used stably;
Corrosive environments (such as coastal ports): Additional galvanizing or anti-corrosion coating is required, and regular rust removal can extend the service life by 5-8 years.
As a world-leading manufacturer of rail fastener systems, Gnee Rail Fasteners has 18 years of professional experience, an annual production capacity of 10 million sets, and its products are exported to more than 60 countries. We have built 5 production bases, equipped with 400 technicians, and annual R&D investment exceeds 5% of revenue.
Our products have been used in more than 2,000 railway projects, with a total of 50,000 kilometers of track laid, covering more than 100 high-speed rail projects. From -40℃ to 80℃, the product performance remains stable and reliable. With strict quality control and professional technical support, more than 85% of our customers maintain long-term cooperation with us, and customer satisfaction continues to remain above 93 points.
