GB 50KG heavy rail refers to a heavy rail that meets the national standard (GB) and weighs 50 kilograms per meter. The following is a detailed introduction:
Specifications: The cross-sectional dimensions of GB 50KG heavy rails are specified. The rail height is usually 152 mm, the bottom width is 132 mm, the head width is 70 mm, and the waist thickness is 15.5 mm. These dimensions are designed to meet the strength and stability requirements of railway tracks and ensure that trains can run safely and smoothly.
Material characteristics: Generally made of high-carbon steel or medium-carbon steel, and undergo a special heat treatment process to improve the strength, hardness and wear resistance of the rails. This material can withstand the huge pressure and impact force generated by the operation of the train, reduce the wear and deformation of the track, and extend the service life of the track.
| Material grade | Tensile strength | Main application | Percentage | |||||
| U71Mn | ≥880MPa | Conventional railway, subway, secondary lines | ~50%(Stock) | |||||
| U75V | ≥980MPa | High-speed railway (such as Beijing-Shanghai, Beijing-Harbin) | ~45%( New construction) |
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Application areas: Mainly used in railway trunk lines, such as national railways, railway transportation lines of large factories and mines, etc. It is suitable for trains with high running speeds and large loads, which can ensure the reliability and stability of the track and meet the safety requirements of railway transportation.
