Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of railway system-steel rail in China, also supports customized service with low price. Please feel free to buy cheap railway system-steel rail made in China here from our factory.
The steel rails are always in an inconspicuous place for the train to crush and guide the train. The modern steel rail is made of steel. Rails were not like this at the beginning of their birth, or even the current material. At first it was a piece of square wood, and later the wood was covered with iron wrap. As the speed and weight of the train increase, the material of rails becomes steel step by step. In modern times, with the increase of train speed and axle weight, the improvement of the requirements for stability, the improvement of production and manufacturing processes, the classification of rails is becoming more and more detailed.
The chemical composition of train track steel
| 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%. |
| 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. |
| 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. |
| 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. |
| 5 | P | It is a harmful element. The biggest hazard of phosphide is to reduce the plasticity and toughness of the steel. |
| 6 | S | The sulfur is a harmful element. It is often left in the steel in the form of granules. |
The main damages of railroad metal
The side wear of the upper strand and the crush of the lower strand.
The wave wears caused by insufficient yield strength.
Brittle fracture, spalling, falling blocks, rail head-splitting, and weld cracks caused by low toughness and plasticity.
Therefore, the basic requirements for rail steel include: wear resistance, crush resistance, brittle fracture resistance, fatigue resistance, and good weldability.
The requirements for an High Quality Steel Rail are as follows.
The rail should have the most economical section consistent with strength, stiffness, and durability.
The centre of gravity of the rail section should preferably be very close to the mid-height of the rail so that the maximum tensile and compressive stresses are equal.
There should be an economical and balanced distribution of metal in the different parts of the rail so that each of them can fulfill its requirements properly.
Hot Tags: railway system-steel rail, China railway system-steel rail manufacturers, suppliers, factory, Composite Sleeper, Q345B Frog Bolt, Railroad Tie Plate, Ordinary Rail Gauge Rod, Railway Tie Plates, DIN Standard Railway Fish Plate
