... 50Mn ,U71Mn Standard: GB2585-81, GB2585-2007vv3. Crane Rail Specification: QU70, QU80, QU100,QU120 Unit Weight: 52 ... Material: U71Mn Standard: GB3426-824. Japan& Korea Standard Rail Specification: 37A, 50N, CR73 Unit Weight:37.2kg/ ... 9m Material: 55Q Standard: South Africa Standard6. English Standard Rail Specification: 60A, 60R, 70A, 75A, 75R, 80A, ... Standard: GB3426-82 Heavy railroad steel train rail