The 43kg rail is a widely used GB standard rail profile designed for medium-duty track systems. Manufactured under GB/T 2585, it delivers consistent quality through a proven hot rolling process. This rail type is a practical choice for branch railways, industrial tracks, mining transport lines, and port rail systems.
With a well-balanced design, the 43kg rail offers solid bending strength and reliable wear resistance. It handles typical freight loads and internal transport operations without overengineering the system. At the same time, it helps keep project costs under control, making it a smart option for applications that need both performance and cost efficiency.
The following table outlines the detailed dimensions of the 43kg rail. It covers key parameters such as rail height, head width, and web thickness, providing a clear reference for track installation, fastening system compatibility, and project planning.
| Type of Rail | Standard | Dimensions mm | Steel Grade | Mass M | |||
| Height | Base Width | Head Width | Web Thickness | kg/m | |||
| 43kg Rail | GB2585-2007 | 140 | 114 | 70 | 14.5 | U71Mn | 44.653 |
Rail Length Options：
Standard length of 43kg rail is 12.5 meters. Custom cutting is available according to customer requirements, including straight cutting and oblique cutting.
The 43kg rail is available in two standards to match different applications: GB/T for crane and industrial rail systems, and TB/T for railway track use under dedicated railway specifications. This allows the rail to adapt to a wide range of working conditions.
U71Mn is the primary steel grade used for the 43kg rail. Its mechanical properties and chemical composition play a key role in wear resistance and fatigue performance. The detailed parameters are listed in the table below.
| U71Mn | Mechanical Property | Chemical Composition | ||||||||||||
| Yield strength | Tensile strength | Elongation | Hardness | C | Si | Mn | S | P | Cr | Ni | Cu | |||
| MPa | kg/mm² | MPa | kg/mm² | min | HB | ≤ | ≤ | ≤ | ≤ | ≤ | ||||
| ≥880 | 9% | 0.65-0.76 | 0.15-0.35 | 1.10-1.40 | 0.030 | 0.030 | 0.25 | 0.25 | 0.25 | |||||
Ready Stock Available
43kg rail is kept in stock with complete specifications. Sample requests are supported, helping shorten lead times and meet urgent project needs.
Custom Cutting Options
GlorySteelWork offer cut-to-length services, including straight and angled cuts, to match different installation and track layout requirements.
Reliable Quality Control
Each 43kg rail undergoes strict inspection, including ultrasonic testing, to ensure there are no internal cracks or defects. Products comply with both GB/T and TB standards.
One-Stop Supply
GlorySteelWork can supply matching rail accessories such as fish plates, bolts, and rail clips, so you don’t need to source from multiple vendors.
Technical Support
Our team provides product guidance, application advice, and order follow-up to make your purchasing process smooth and efficient.
We offer stable stock, custom cutting, and full accessory support to match your project needs. Send us your specifications today and get a fast, accurate quote from our team.