... A,BQ275 A,B 6-80 mmGB700-1988Steel structure, City construction, mechanical production 2Low alloy steel plate Q345 A,B,C ... 6-60 mm YB(T)10-18 GB/T714-2000Railway, Highway, Bridge production 8Through-thickness characteristicssteel plate Q235C/D-Z15/Z25/Z35 ... mmGB700-1988, GB/T1591-1994, GB5313-1985 steel structure, City construction 9Foreign standard steel plate A36, S235JR, S235JRG2, SS4008-60 mm ...