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/m, 15kg/m, 18kg/m, 22kg/m ... Length: 12m Material: U71Mn Standard: GB3426-82 6-30kg railroad light steel rail for farm or mining steel rail