... )OD:10mm*10mm~600mm*600mm --Welded Square Steel Pipe/Welded Square Steel Tube-- Material of Welded Square Pipe: 1) Q195, Q215, Q235, Q345 ... ~600mm*600mm W. T of Welded Square Pipe: 0.6mm~25m Section Shape: Suqare Product Type: Square tubes, ERW tubes, Welded steel pipe ... and construction Industry, traffic and communication, and so on. --Remark-- Square Steel Pipe is used extremely wide. It is also a ...