18kg steel rails mine rail , crane rail , train rail , iron rail Standard: BS, DIN, GB, JIS Grade: 55Q, Q235, 45Mn, 50Mn 18kg steel rails Steel Rail1. Light Rail ... .514kgm Length: 12.5m Material: 50Mn ,U71Mn Standard: GB2585-813. Crane Rail Specification: QU70, QU80, QU100,QU120 Unit Weight: 52.80kg ... .96kg.m Length: 12m Material: U71Mn Standard: GB3426-82 18kg steel rails