... platedescriptionGradeSpecification MMStandardUse scopeCommon carbon steel plateQ235A,B,C,D Q255A,B, Q275A,BThickness:6-120Width:1400- ... 4100Length:6000-28000GB/T3274-2007Steel structure,city buiding,mechanical productionLow alloy steel plateQ345A,B,C,D,E Q390A,B,C ... ,D,E,Q420A,B,C,D,EQ460D,EThickness:6- ...