High Quality 40X80 mm Steel Square Steel Tube for Building Material

High Quality 40X80 mm Steel Square Steel Tube for Building Material. Wide Size Range: Square sizes 15*15-500*500mm and rectangular sizes 20*30-400*600mm available. Multiple Material Grades: Available in ASTM A36, SS400, S235JR, S355JR, ST37, ST52, Q195, Q235, Q345. Customizable Length: Length can be customized according to specific customer requirements. Fast Delivery for Stock: Stock products ship within 2-5 days after receiving deposit or T/T. Quality Assurance: Mill Test Certificate supplied with shipment; 100% finished product inspection. Flexible Payment Terms: Accept 30% TT down payment with 70% balance, or L/C. OEM/ODM Service: Supports full customization, minor customization, and customization from samples or designs. Versatile Applications: Suitable for pipeline transport, boiler pipes, hydraulic/automobile pipes, mining, and construction.