Q345 Circle Welded Steel Tube , Hot Rolled Square Steel Tube
(1) Q235: According to standard GB700-2006；
(2) Q345: According to standard GB700-2008；
<Cold formed steel hollow sections for general structure--Dimensions,shapes,weight and permissible deviations>(GB/T6728-2002)
Length could be customized, which is usually within 4,000mm-12,000mm. If you need some special length, it may be discussed by both parties.
Specification: Please refer to the form below.: