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Heavy rail , or heavy-duty rail, is different from light rail. It is a track for heavy vehicles. It represents not the weight of the monorail track itself, but it is related. Vehicle weight is divided into light rail and heavy rail. Track width is divided into wide rail, standard rail, narrow rail, heavy rail applications are mainly national standard cross-area railroads (including high-speed railroads, heavy railroads) , intercity railroads, urban areas. Rail weight Steel rail specifications are expressed in net kilograms per meter of length. Steel rail per meter nominal weight of more than 60 kg belongs to heavy rail, heavy rail is divided into two kinds of ordinary rail and crane rail. Ordinary rail is the laying of railroad main line, special line, corner and tunnel rail. Among them, the standard rail length of 25 meters and 50 meters or 500 meters high speed rail continuous welding, laying curve curve rail, slightly shorter length, 24.96 meters, 50.92 meters, etc., high speed rai

Introduction of steel rails Steel rail is the main component of railroad track. Its function is to guide the wheels of rolling stock forward, to withstand the tremendous pressure of the wheels, and to transfer it to the rail sleepers. The rail must provide a continuous, smooth and minimal resistance rolling surface for the wheels. In the electrified railway or automatic blocking section, steel rail can also be used for track circuit. The stress conditions of steel rails are complex, in the process of use, the rail end part of the periodic impact load. Under the action of the train wheel, the rail tread has contact stress, rolling friction in locomotive operation and sliding friction when braking. The damage to the rail is mainly in the form of fracture, tread wear, etc. In order to be able to adapt to the railroad transport high speed, heavy load needs, as well as in order to ensure the train high speed in the operation of the smoothness, comfort, safety and high operational efficien