What is the rail of the railway?
The rail is made of high manganese steelSteel temper is strange and interesting: if added in steel 2-3% manganese, then the prepared low manganese steel brittle like glass, knock is broken. However, if you add more than 13% manganese, made of high manganese steel, so it is not only hard and durable.
So people use manganese steel to make wear-resistant machine parts and rails, bridges and so on
Also, in the upper rail, the layer and is contacted with a wheel, is adding another metal, indium, it added to the rail on the part of the hardness of the case, even has some toughness, the train wheel is very important, it and the "tire" contact, the collision, there will be some flexibility, to ensure the safe operation of the train.
