1)I-beam of mine usage steel:9#,11#,12# 2)Material: 20MnK/Q235 3)Length ... YB/T5047-2000 I-beam of mine usage steel:9#,11#,12# THE LIST OF YYGT Name of CommoditySpecificatonMaterialsStandard ... /bundle)Light Rail4kg/mQ235Q/YYG001-20084kg/m6,8,9,10758kg/mQ235Q/YYG001-20088.42kg/m5512kg/mQ235GB11264-8912. ... Q235 GB4697-1991 Q/YYG006-200824.95kg/m8,9,10,121529UGB4697-199129kg/m1536UQ/YYG006-200835.87kg/m15 ...