U-beam of mine channel steel: 25U,29U,36U Material: ... 9m,10m,12m Standard: GB/T4697-1991,Q/YYG006-2008 u beam THE LIST OF YYGT Name of CommoditySpecificatonMaterials (Steel ... /T5047-200026.05kgs/m1812#YB/T5047-200031.18kgs/m15Hot-Rolled U-Beam Steel for Mine Timbering 25U20MnK/ Q275GB4697-1991 /Q ... 8.5038/43/50kgs/mGB185-6324-30≈7901 If you are interested in our products,please contact us,We can provide ...