Carbon steel i beam 1.Grade: Q235B,SS400,A36,S235JR,S275JR 2.Size: 100*68-630*180mm 3.Length:6m,9m,10m,12m 4.Best price 1.size range:waist-length(100mm-700mm)/leg-width(55mm-210mm)2.materal:carbon steel(Q235 series/Q295series/S235JR-S355J2),St series,A36-A572 and so on3.executive standard:ASTM/DIN/JIS/GB/EN/FN/BS4.packaging:standard exp-package or as customers' reuirements5.application:building ...