Chinese rails are classified by weight into 75kg/m, 60kg/m, 50kg/m, 43kg/m and other types. Among them, 60kg/m and 50kg/m rails are laid on the main trunk lines. These rails are mostly made of manganese steel, and the standard implemented is the national standard GB 2585-2007.
1. Main types of Chinese rails
Chinese rails can be divided into three types according to the approximate weight per meter: light rail, heavy rail and crane rail. Light rails mainly have different rail types such as 9, 12, 15, 22, and 30kg/m, which are mainly used in urban rail transit and mining railways. Heavy rails mainly have rail types such as 38, 43, and 50kg/m. Among them, 60kg/m and 50kg/m rails are laid on the main trunk lines, and 43kg/m rails are mostly used for station lines and dedicated lines. Crane rails are mainly used for tracks for cranes and other heavy equipment, and their single weight can reach up to 118kg/m.
2. Material of Chinese rails
Most Chinese rails are made of manganese steel, such as U71Mn, 50Mn, etc. Manganese steel has high strength and wear resistance, and can withstand the huge pressure and impact load of wheels. In addition, depending on the purpose and use environment, other alloy elements may be added to the rails to improve their performance, such as copper, silicon, etc.
3. Implementation standards of Chinese rails
Chinese rails implement the national standard GB 2585-2007. This standard specifies the terms and definitions, ordering content, dimensions, shape, quality and allowable deviations, technical requirements, test methods, inspection rules, etc. of hot-rolled rails for railways. The implementation of this standard ensures the quality and safety of Chinese rails and provides a strong guarantee for the smooth and safe railway transportation.
