In the field of railway track materials, U71Mn 50KG GB heavy rail occupies an important position with its excellent performance. U71Mn is a high-carbon steel containing manganese, produced in accordance with GB/T 2585-2021 standard. Its carbon content is about 0.65%-0.77%, and its manganese content is 0.80%-1.10%. Phosphorus and sulfur impurities are strictly controlled to ensure material quality.
| Chemical Components % | |||||||||||
| Mark | C | S1 | Mn | P | S | ||||||
| U71Mn | 0.65-0.77 | 0.15-0.35 | 1.0-1.5 | ＜0.040 | ＜0.040 | ||||||
In terms of performance, U71Mn 50KG GB heavy rail has both strength and toughness, can withstand the dynamic load and impact force of train operation, and effectively reduce track deformation and damage; outstanding wear resistance, through heat treatment to optimize the internal structure, improve hardness, reduce friction loss with wheels, and extend service life; good fatigue resistance, can resist fatigue stress caused by repeated rolling of trains, reduce the risk of cracks and fractures, and ensure railway transportation safety.
In terms of application scenarios, it is suitable for ordinary railway trunk lines to support the daily operation of passenger and freight trains; in industrial railways, such as mines and factory internal railway lines, it can cope with heavy-load transportation needs; it is also commonly used in urban rail transit branches or sections with moderate rail load requirements, contributing to urban traffic relief. U71Mn 50KG GB heavy rail has become a solid guarantee for railway transportation with its reliable performance.