Shanghai Metal Corporation is delighted to supply the series of cold formed products such as square steel tubes, rectangular steel tubes and circular steel tubes. With the size range from 60x60 to 300x300, wall thickness from 2mm to 19mm.

Square Steel Tube is a welded structural grade tubing that is available in either type A513 or A500 Grade B, depending on its size and wall thickness. 

Either grade is ideal for all structural applications, general fabrication, manufacturing and repairs. 

Engineering Specifications: 
1) Torsional shear constant of cross-section 
2) Moment of inertia of cross-section
3) Torsional stiffness constant of cross-section
4) Governing radius of gyration, elastic section modulus and plastic section modulus
Some of these specifications are for both X-X and Y-Y axes. For exact specification for each nominal size and wall thickness, please see other sources.

Features of Steel Square Tube:
1) Excellent equipment
2) Capacity of producing high accurate
3) Heat treatment technical equipment
4) Strict quality management
5) Strong technology and development
Cutting and slitting can be customed as customers' request.

Specifications of Steel Square Tube:

1) Square Dimension: 40mm*40mm - 400mm*400mm (if you need special size, please feel free to contact us)

2) Wall thickness: 3mm - 16mm

3) Length: 6m - 12m (suitable for shipping container packing), can be cutting as customer’s requirements

4) Zinc coating:

Pre-galvanized steel square tube: 60g/m² - 150g/m²

Galvanized steel square tube: 200g/m² - 400g/m²

Manufacturing of Steel Square Tube

Uncoilding → Flatting → Shearing and butt welding → Circle shearing → Loop storing → Water cooling → Removal of burrs → High frequency welding → Roll forming → Forming → Nondestructive inspection → Cutting off → Corrosion resistant coating → Packing and warehousing → Marking → Inspection

Packaging of Square Steel Tube

Shanghai Metal Products are packed and labeled according to the regulations and customer's requests. Great care is taken to avoid any damage which might be caused during storage or transportation. In addition, clear labels are tagged on the outside of the packages for easy identification of the product I. D. and quality information.

1) Shanghai Metal Standard

2) Customization

Shanghai Metal Corporation provides standard seaworthy packaging to worldwide customers, usually the tubes are packed in bundles, wrapped by plastic bag, fixed by steel strip, and then placed in the container with steel wire fixing. All these packing detail are ensuring your goods safe to your hand during the delivery, we also accept customization for your special requirements. Please feel free to contact us. 

Steel square tube is widely used in industrial maintenance, agricultural implements,

transportation equipment, truck beds, trailers, frames, etc.

Its box-shape configuration allows for much greater strength and rigidity compared to angles or channels.

This steel shape is easy to weld, cut, form and machine with the proper equipment and knowledge. 

Applications of Steel Square Tube:

1) Tower foundation

2) Tower crane

3) Container frame

4) Steel Structure

5) Expressway safety guard

6) Machinery

7) Agricultural canopy

8) Greenhouse

9) Railing

Hollow section steel tube is mainly divided into 3 fields:

1) Building structural members: for columns and beams, truss member in long-span construction auxiliary structural member

2) Mechanical members: for construction machinery, agricultural equipment, machinery frames and parts

3) Others: for rack, pallet, high-rise automated warehouse, etc.