... 2) Outer diameter:19mm-219mm 3) Wall thickness:1.5mm-12mm 4) standard:BS1387,ASTM A53,GB,DIN Name ... ) Channel steel:Size 8# -30#, web thickness 4.5mm-9.5mm,Flange thickness 7mm-13.5mm9) IPE: Size 100mm-270mm, ... 4.2mm-5.6mm11)IBEAM:Size100mm-360mm,web thickness4.5mm-12mm,Flange thickness7.6mm-15.8mm12) H BEAM: ... 1.725x450.7--1.730x600.9--1.725x700.9--1.728x700.9--1.730x700.9--1.730x800.9--1.740x801.0--1. ...