Rail is the main component of railway track. Its function is to guide the wheel of the rolling stock, to bear the great pressure of the wheel and to deliver it to the sleeper. The rail must provide a continuous, smooth, and least resistant rolling surface for the wheel. In electrified railway or automatic block section, rail can also be used as track circuit.
This is the main rail material of different carbon content, the other is brittle and ductile tensile strength and impact strength are not the same, 55Q rail material is mainly used for mine rail, and Q235 is more commonly used, but cheaper
