
Railway track material Steel rails
出版:Rail Industry Safety and Standards Board

專家解讀視頻
This Standard specifies requirements for as-rolled and hardened steel rails made from continuously cast blooms and profiles for asymmetric switch rails and elevated guardrails for railway purposes.This Standard does not apply to the manufacture of steel rails with a nominal minimum surface hardness greater than 350 HB, including super-pearlite, hyper-eutectoid or other premium alloy rails.