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REEDRLON 8yr.

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Description

Square tube 20*20 1.3-2.5 20*30 1.3-2.75 25*25 1.3-2.75 20*40 1.3-2.75
Square tube 30*30 1.3-2.75 25*40 1.3-2.75 40*40 1.3-3.75 30*50 1.3-4.75
Square tube 50*50 1.3-5.75 30*60 1.3-4.75 60*60 1.3-5.75 40*50 1.3-4.75
Square tube 70*70 1.3-5.75 40*80 1.3-4.75 80*80 1.3-5.75 50*70 1.3-4.75
Square tube 90*90 1.3-5.75 50*80 1.3-4.75 100*100 1.5-12.0 60*90 1.3-4.75
Square tube 120*120, 2.5-12.0, 50*100, 1.3-5.75, 140*140, 2.75-16.0, 50*150, 1.3-5.75
Square tube 150*150 2.75-16.0 60*160 1.3-5.75 160*160 3.0-16.0 100*150 2.5-16.0
Square tube 180*180, 3.0-16.0; 100*200, 2.5-16.0; 200*200, 3.0-16.0; 100*250, 2.5-16.0
Square tube 250*250 4.75-16.0 150*300 4.5-16.0 300*300 4.75-16.0 200*300 5.5-16.0
Square tube 400*400 4.75-16.0 200*400 5.5-16.0 500*500 4.75-16.0 400*600 5.5-16.0

A square tube is a lightweight, thin-walled steel pipe with a hollow square cross-section, also known as a cold-bent steel profile. It is made from Q235 hot-rolled or cold-rolled strip steel or coil plate, processed through cold bending, followed by high-frequency welding to form a square cross-sectional shape and dimensions. Unlike extra-thick hot-rolled square tubes, which only increase wall thickness, the corner dimensions and edge straightness of these tubes reach or even exceed those of resistance-welded cold-formed square tubes.

Process flow for producing tube blanks:

Material Selection --- Material Inspection --- Storage of Materials --- Roll Extrusion Forming --- Straightening --- Work Process Inspection, Intermediate Inspection --- Heat Treatment --- Mechanical Property Testing --- Chemical Analysis --- Tensile Test --- Storage of Finished Products --- Finished Product Inspection --- Storage of Products

Update time：20261010144726

square tube square tube 方管Square tube