Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of u71mn u75v 75kg heavy rail in China, also supports customized service with low price. Please feel free to buy cheap u71mn u75v 75kg heavy rail made in China here from our factory.
Product Introduction
GB heavy rails are railway steels with high strength, high wear resistance and good toughness. They are produced according to GB standards. The rail head is in direct contact with the wheel. Its special arc shape design can effectively disperse the pressure transmitted by the wheel and reduce stress concentration. The rail waist plays the role of connecting the rail head and the rail bottom. The reasonable thickness design reduces the overall weight of the rail while ensuring sufficient support strength. The rail bottom has a larger bottom width and a suitable slope to enhance the contact stability between the rail and the sleeper. When the train wheels roll at high speed on the heavy rails, this precisely designed structure can effectively disperse the dynamic load, reduce the deformation and wear of the rails, greatly extend the service life of the track, and provide a solid and reliable foundation for the railway transportation system.
U71Mn 75KG heavy rails are widely used in heavy-load railways and busy trunk railways. For example, they are laid on the busy and heavy-load trunk lines of the four railway bureaus in Beijing, Zhengzhou, Shenyang and Jinan. The cumulative freight volume in some sections has exceeded 700 million tons, fully demonstrating its ability to withstand heavy loads on busy railways.
U75V 75KG heavy rails are often used in special sections of high-speed railways, urban rail transit, and lines with high requirements for rail wear resistance and corrosion resistance. Such as high-speed railway bends, turnouts and other easily worn parts, as well as sections of urban rail transit with high train running frequency and complex environment.
Product Specifications
| 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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Product Packaging & Delivery
When packaging heavy rails, first use a high-pressure air gun to remove the oxide layer and impurities on the surface of the rails to ensure that the cleanliness of the base material reaches the Sa2.5 standard. Then use a non-contact spraying device to evenly apply modified asphalt anti-rust oil, and the oil film thickness is strictly controlled within the range of 0.08-0.12mm.
The anti-rust packaging adopts a three-layer composite structure: the inner layer is anti-rust paper containing corrosion inhibitors, the middle layer is a polyethylene moisture-proof film, and the outer layer is 450g/m² industrial canvas. The steel belt bundling adopts a cross-fixing method, and the pre-tightening force of each steel belt is maintained at 3000±200N. The joints are double-locked with stainless steel fasteners. After the packaging is completed, a waterproof transport label is pasted in a prominent position, and the whole is packaged with heat shrink film. This packaging method extends the anti-rust period of heavy rails to 180 days while ensuring economy.
As an enterprise with profound background in GB heavy rail foreign trade, GNEE RAIL is committed to becoming a leader in GB heavy rail international trade with the mission of promoting global railway infrastructure construction. GNEE has built a complete supply chain system and works closely with top heavy rail manufacturers at home and abroad.
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