Tag - Why 60kg rail was updated to 60N railway steel rail?

Why TB/T 2344 60kg rail was updated to 60N railway steel rail?

Chinese TB/T 2344 standard 60kg rail is widely used for Chinese express railway rail that running speed over 350 km/h, after long term using, the technicist found that the both edge of rail head always be abrased after one year, and the wheel hub also be abrased much more too. So they reduce the width of P60 rail head from 73mm to 70.8mm, the radian more near wheel hub, so as to reduce the abrasion. Please compare the drawing as [...]

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