1、舞钢Q420qF桥梁板技术标准：GB/T 714-2015 桥梁用结构钢2、Q420qF桥梁钢化学成分牌号CSiMnPSNiCrMoQ420qF≤0.11≤0.551~1.7≤0.015≤0.006≤0.3≤0.5≤0.2CuNbVTiAltAlsNBPcmMax≤0.30.010~0.090.010~0.080.006~0.030.015~0.050.010~0.045≤0.008≤0.0005≤0.22成分备…