Common crossings in 109 Lb./Yd. F.B. rail : service trials with point rails of various hardnesses and steels in standard built up crossings (E-391)

12. Hardening of medium manganese point rails by the Peddinghaus process has resulted in reduced deformation of the point rail head without other defects occurring as the result of the heat treatment. 13. Hardening of medium manganese point rails by the other processes has given inconsistent performance, although generally...