The material of the 12KG GB light rail is usually 55Q or Q235B. 55Q has good strength and wear resistance, and is suitable for scenarios with high requirements for track durability; Q235B has good comprehensive performance and relatively low cost, and is widely used in some cost-sensitive places where the use environment is not too harsh.
| 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
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| 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 | ||||
From the perspective of size parameters, the height of the 12KG GB light rail is 69.85mm. This height design can not only ensure the stability of the light rail vehicle, but also be well adapted to related components such as bogies. The bottom width is also 69.85mm, which provides sufficient support area for the track, disperses the pressure generated during vehicle operation, and enhances the stability of the track in long-term use. The head width is 38.1mm, which helps guide the direction of the wheel and ensure the accuracy of the vehicle's driving trajectory. The waist thickness is 7.54mm. While ensuring the strength of the track structure, the amount of material is reasonably controlled, achieving a balance between economy and practicality. The theoretical weight is 12.2kg/m. This weight specification makes it easy to transport and install while also meeting the load-bearing requirements of general light transportation.
The standard length of P12 light rail is generally between 6-12m, and the common length size series include 9m, 9.5m, 10m, etc. This diversified length setting facilitates the laying work under different line planning and site conditions, reduces the workload of secondary processing such as on-site cutting, and improves construction efficiency.