What are the differences between GB 30kg and S20 steel rail?
Apr 27, 2026
What are the differences between GB 30kg and S20 steel rail?
The primary difference between GB 30kg steel rail (Chinese Standard GB/T 11264) and DIN 5901 S20 rail is their weight class and intended load capacity. The GB 30kg is a "heavy-duty" light rail, weighing 30.10 kg/m, which is over 50% heavier than the S20's 19.80 kg/m. While the S20 is designed for precision industrial applications like automated warehouses and light gantry cranes, the GB 30kg is a robust profile built for heavy mining ore cars and permanent industrial transport lines.
Key Dimension Comparison (Approximate):
- Rail Height: GB 30kg (107.95 mm) is ≈ 8 mm taller than S20 (100 mm).
- Base Width: GB 30kg (107.95 mm) is ≈ 26 mm wider than S20 (82 mm).
- Head Width: GB 30kg (60.33 mm) is ≈ 16 mm wider than S20 (44 mm).
- Web Thickness: GB 30kg (12.3 mm) is ≈ 2.3 mm thicker than S20 (10 mm).
Detailed Dimension Differences
| Dimension | GB 30kg Rail (GB/T 11264-2012) | S20 Rail (DIN 5901) | |
|---|---|---|---|
| Weight | 30.1 kg/m | 19.8 kg/m | |
| Height | 107.95 mm | 100 mm | |
| Bottom Width | 107.95 mm | 82 mm | |
| Head Width | 60.33 mm | 44 mm | |
| Web Thickness | 12.3 mm | 10 mm |
Material Strength and Load Bearing
The service life of both rails depends on the steel grade and resulting hardness. GNEE RAIL produces these rails with a focus on high-carbon manganese alloys to ensure structural integrity:
- Vertical Rigidity: The S20 rail section utilizes its 100.00 mm height to maintain stiffness for its weight class. However, the GB 30kg profile is much more rigid, featuring a 12.30 mm web that is nearly twice as thick as the S20's 7.00 mm web, providing superior shear resistance.
- Surface Hardness: Using 55Q grade steel provides a hardness of 200–240 HB. On the narrower 30.00 mm head of the S20, this hardness is vital to prevent "mushrooming." On the wider GB 30kg, it ensures the head resists abrasive wear in heavy mining environments.
| 55Q | Mechanical property | Chemical composition(%) | |||||||||
| Yield strength | Tensile strength | Elongation | Hardness | C | Si | Mn | S | P | |||
| MPa | kg/mm² | MPa | kg/mm² | min | HBW | ≤ | ≤ | ||||
| ≥ | ≥ | ≥ | ≥ | ≥ | |||||||
| 685 | 69 | 197 | 0.50-0.60 | 0.15-0.35 | 0.60-0.90 | 0.04 | 0.04 | ||||
What are the differences in application fields between GB 30KG rail and S20 rail?
The primary differences between GB 30KG rail and S20 rail lie in their weight, structural standards, and specifically, their application fields. GB 30KG rail is a higher-capacity light rail (approx. 30.1 kg/m) used for heavier industrial loads and mining, while S20 rail is a European standard light rail (approx. 19.8 kg/m) designed for lighter industrial, crane, and transportation needs.
GB 30KG Rail Application Fields
- Mining Transport: Commonly used in coal, metal, and non-metal mines for both underground and open-pit rail transport systems.
- Heavy Industrial In-Plant Transport: Used inside production workshops, machinery factories, and steel mills for transport lines and heavy-duty trolleys.
- Crane Runway Systems: Serves as tracks for small-to-medium overhead cranes, gantry cranes, and trolley wheels in logistics warehouses.
- Temporary Transportation Lines: Used in construction sites and forestry areas for moving materials and equipment.
- Port & Logistics: Employed as crane tracks in port container terminals and for heavy forklift guidance, supporting loads up to 15 tons.
S20 Rail Application Fields
- Light Industrial Logistics: Ideal for smaller, factory material transport, trolleys, and conveyor rails in manufacturing plants.
- Light-Duty Crane Systems: Used for small lifting equipment and overhead cranes in warehouses and workshops.
- Tram & Light Rail Transit: Utilized in urban transport, specifically for trams or tourist sightseeing trains.
- Mine & Tunnel Logistics: Suited for lighter ore transport vehicles and underground logistics where space and load requirements are lower.
- Construction & Assembly: Used as rails for moving machinery or in assembly workstations.
Get a Quote in 24 Hours
GNEE RAIL provides GB 30kg, DIN 5901 S20, and a full range of international standards directly from our manufacturing facility. We supply all matched rail joint bars, high-tensile bolts, and fastening clips to ensure a perfectly compatible system. Our CNC workshop handles precision cutting and custom drilling to your exact technical specifications. Send your project requirements to GNEE RAIL now to receive a detailed quote and CAD support.
