12kg steel rails mine rail , crane rail , train rail , iron rail Standard: BS, DIN, GB, JIS Grade: 55Q, Q235, 45Mn, 50Mn 12kg steel rails Steel Rail1. Light Rail Specification: 12kg ... Material: Q235, 50Q, 55Q Standard: YB222-63, GB11264-892 GB Heavy Rail Specification: 38kg/m, 43kg/m, 50kg/m Unit Weight: 38 ... : 12m Material: U71Mn Standard: GB3426-82 6-30kg railroad light steel rail for farm or mining ...