1.Forming way:cold-formed
.2.Welded way:ERW
3.Material: Q235,Q345.20#.L245
4.The standards: GB/T6725-2002, GB/T6728-2002
5.Yield strength:350-360Mpa
6.Tensile strength:520-550Mpa
7.Elongation:20%-26%
8.Bend test:qualified
9.Impact value:V-notch.
10.OD:250*250~500*500mm
11.Wall thickness: 8.0 ~20.0mm
12.Application: construction, road and bridge,transportation, decoration