... 2) Type: taper round or octagonal pole Steel Traffic signal pole1.Shape:Conoid ,Multi-pyramidal,Columniform,polygonal or conical2.Material ... polyester power could be coated on the surface)High strength low alloy steel Q235,Q345,GR65,GR50he mechanical properity ... aganist wind pressure of 1605.Minimum yield strength:355 mpa6.Minimum ultimate tensile strength :490 mpa7.Max ultimate tensilestrength:620 ...