I-beam of mine usage steel:9#,11#,12# ... Length:8m,9m,10m 3.Standard:YB/T5047-2000 I beamHeBei YongYang Steel Company Ltd. is a joint venture ... Rail38kg/mU71MnGB2585-2007 Q/YYG002-200838.73312,12.51043kg/mU71GB2585-2007 Q/YYG002-200844.6531050kg/m45MnGB2585-2007 Q/YYG002-200851.51410Crane ... beam Of The Mine Channel Steel25U20MnK/ Q235 GB4697-1991 Q/YYG006-200824.95kg/m8,9,10,121529UGB4697-199129kg/m1536UQ ...