Rail track is an essential component of rail track, and its function is to guide the train wheels moving forward by withstanding the enormous pressure pushed by the wheels.
Since 2008, GNEE RAIL has been supplying steel rails of different grades for more than 18 years, steel rails from GNEE is highly recommened in China and abroad.Wtih cutting edge equipment, GNEE produces high quality steel rails that meet with requirements of most countries. Standard rail, head hardened rail, heavy rail,light rail,crane rail and other types are all available here, as one of the China main rail supplier, GNEE RAIL has been working on supplying economical green railway products all over the world.
| Classification | Height(mm) | Head (mm) | Bottom (mm) | Thick(mm) | Weight (kg/m) | |
| Light Rail | 8 KG/M | 65 | 25 | 54 | 7 | 8.42 |
| 9 KG/M | 63.5 | 32.1 | 63.5 | 5.9 | 8.94 | |
| 12 KG/M | 69.85 | 38.1 | 69.85 | 7.54 | 12.2 | |
| 15 KG/M | 79.37 | 42.86 | 79.37 | 8.33 | 15.2 | |
| 18 KG/M | 80 | 40 | 80 | 10 | 18.06 | |
| Classification | Height(mm) | Head (mm) | Bottom (mm) | Thick(mm) | Weight (kg/m) | |
| Heavy Rail | 38 KG/M | 134 | 68 | 114 | 13 | 38.733 |
| 43 KG/M | 140 | 70 | 114 | 14.5 | 44.653 | |
| 45 KG/M | 145 | 67 | 126 | 14.5 | 45.546 | |
| 50 KG/M | 152 | 70 | 132 | 15.5 | 51.514 | |
| 60 KG/M | 176 | 73 | 150 | 16.5 | 60.64 | |
| Classification | SIZE(mm) | theoretical weight | |||||||||
| height | bottom width | head width | waist depth | ||||||||
| Crane rail | QU70 | 120 | 120 | 70 | 28 | 52.8 | |||||
| QU80 | 130 | 130 | 80 | 32 | 63.69 | ||||||
| QU100 | 150 | 150 | 100 | 38 | 88.96 | ||||||
| QU120 | 170 | 170 | 120 | 44 | 118.1 | ||||||
What is the composition of rail steel?
Rail steel is primarily a high-carbon steel, with key components being Iron (Fe), Carbon (C) (around 0.6-0.8% for strength), and Manganese (Mn) (0.7-1.3% for hardness/toughness). It also contains smaller amounts of Silicon (Si) (for density), with strict limits on harmful elements like Phosphorus (P) and Sulfur (S) (under 0.05%) to prevent brittleness, plus optional alloying elements like Chromium (Cr), Vanadium (V), or Niobium (Nb) for enhanced properties, often with heat treatment for superior wear resistance.
Key Elements & Their Roles:
- Carbon (C): Essential for tensile strength; higher content (up to 0.82%) increases hardness and wear resistance.
- Manganese (Mn): Improves strength, toughness, and wear resistance, allowing for higher carbon content.
- Silicon (Si): Acts as a deoxidizer, removing bubbles and increasing density.
- Phosphorus (P) & Sulfur (S): Undesirable impurities, kept very low (≤ 0.05%) to prevent cold brittleness and cracking.
| No. | Element | Function |
|---|---|---|
| 1 | C | Improve the strength, hardness, and wear resistance of the rail. The carbon content of domestic rails is 0.65% to 0.82%. When the carbon content is relatively high, the steel becomes brittle, and its plasticity index will be significantly reduced. At the same time, it will increase the chance of white spots in the steel. |
| 2 | Si | It is easy to combine with oxidation and can play the role of removing bubbles in the metal. The steel contains an appropriate amount of silicon, which can improve the hardness and wear resistance of the steel. The content of domestic rail steel is generally 0159-0.9%, but too much content will make the steel hard and brittle, and it is easy to produce pores in the weld. |
| 3 | Mn | It is a beneficial element that can improve the strength and wear resistance of steel and increase the toughness of steel. It can remove harmful iron oxide and sulfide inclusions in the steel. The manganese content is generally controlled between 0.6% and 1.54%. Steel with a manganese content of more than 1.2% is called medium manganese steel, and its wear resistance is very high. |
| 4 | Cu | It is a beneficial element. Steel contains a small number of copper compounds, which can improve the fatigue resistance and corrosion resistance of steel. The copper content of domestic steel rails is generally between 0.10% and 0.40%. If the rolling process of the copper-containing rail is not good, fish-like cracks will occur on the surface of the rail |
| 5 | P | It is a harmful element. The biggest hazard of phosphide is to reduce the plasticity and toughness of the steel. Especially at low temperatures, the cold brittleness of the steel increases, which easily leads to broken rails, and its content is controlled at no more than 0.04% |
| 6 | S | The sulfur is a harmful element. It is often left in the steel in the form of granules. When the rail is rolled, it is rolled together with the steel into sheets, which causes delamination or longitudinal cracks in the rail. The amount of sulfur is controlled at no more than 0.05% |
Common Grades & Variations:
- Carbon-Manganese Steel: Standard rails, balancing strength and cost.
- Alloy Steels: Add elements like Chromium (Cr), Vanadium (V), or Molybdenum (Mo) for superior strength, wear, and fatigue resistance.
- Heat-Treated Rails (Head-Hardened): Carbon or alloy rails subjected to controlled cooling, creating refined microstructures (pearlite/bainite) for greatly improved mechanical properties and service life, especially on the rail head.
The hardness of hot-rolled railway track metal
| Material | Tensile Strength / Mpa | Hardness / HB |
|---|---|---|
| U75V | ≥980 | 280~320 |
| U78CrV | ≥1080 | 310~360 |
| U76CrRE | ≥1080 | 310~360 |
| U77MnCr | ≥980 | 290~330 |
The hardness of heat-treatment railway track metal
| Material | Tensile Strength / Mpa | Hardness / HB |
|---|---|---|
| U75V | ≥1180 | 320~380 |
| U78CrV | ≥1280 | 370~420 |
At GNEE RAIL, we specialize in providing a full range of rail components, including heavy rail,light rail, crane rail and rail fastening, as well as matching high-performance rail clips and fastening solutions. Backed by strict quality control and industry certifications, our products are engineered to meet international standards and diverse project demands.