... , GB/T8162, ASTM A2...Grade: 10#-45#, Q195-Q345Grade: 10#, 20#, 45#, Q235, Q345, Q195, Q215Thickness: 1.0 - 12 mmSection Shape: SquareOuter ... Thick Wall PipeAlloy Or Not: Non-alloyStandard: BS, GB, ASTMGrade: Q195,Q235,Q345,10#,20#OD: 20*20-600*600mmThickness: 1.0 ... Detail:10-25 days after received the depositSpecificationshigh quality galvanized square tube Sizes:20*20-600*600mm Thickness:1.0-12mm ...