U channel steel Size:30-400mm Grade: Q235B,A36,SS400 Thickness: 1.5~14.5mm Length:6-12m CommodityMaterial Size Unit Angle202 , 304 , 316∠ 25 ~∠ 100MTFlat202 , 301 , 30420 ~ 100MTChannel202 , 304 , 321[ 5 ~[ 20MTStraight Bar301 , 304 , 321 , 3163 ~ 12MTPlain Steel Bars202 , 316 , 304Φ 3 ~ Φ 55MTSquare Bar304 , 202 , 31620 ~80MTHexagon Bar304 , 321 ,316S 10 ~ S 60MT Main ProductsZ steel structure,C ...