Q355 Square Hollow Tube used in construction

Nov 27, 2025

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Product Description

 

Outer Dimensions: 10×10 mm – 600×600 mm
Wall Thickness: 0.6 mm – 20 mm
Length: 5.8 m, 6 m, 12 m (custom lengths available)
Material: Q195, Q235, Q345
Packing: Bundled, or according to customer requirements

 

info-441-441

 

Products Features

 

Flexible and Weldable

Manufactured from low-carbon steel, these tubes are easy to bend, weld, stamp, and fabricate for a wide range of industrial and structural applications.

Heat Reflective

The steel surface helps in reflecting heat, providing a barrier against high temperatures, suitable for outdoor and industrial use.

Durable and Cost-Effective

Strong load-bearing capacity and corrosion resistance ensure a long service life with minimal maintenance.

Customizable

Various shapes, sizes, and wall thicknesses can be tailored to meet project-specific requirements.

 

Products Applications

 

 

Construction & Building: Structural steel pipes, support frames, handrails, fencing, scaffolding

Solar & Renewable Energy: Mounting components for solar panels

Industrial Fabrication: Mechanical structures, machinery frames, storage racks

Infrastructure Projects: Bridges, highways, MRT structures, airport facilities

 

Specifications

 

Size (mm) Wall Thickness (mm) Size (mm) Wall Thickness (mm)
10×10 1.0–2.0 20×10 0.3–2.0
20×20 1.0–2.0 20×40 1.5–3.0
25×25 1.0–2.0 25×50 2.0–2.75
30×30 1.0–3.0 30×50 1.5–3.75
40×40 1.0–3.75 40×60 1.5–4.75
50×50 1.3–4.75 50×70 2.0–4.75
60×60 1.0–4.75 60×80 2.0–5.75
70×70 2.5–4.75 80×100 2.5–4.75
100×100 2.0–5.75 120×120 2.5–5.75
150×150 2.5–5.75 200×200 2.75–9.75
250×250 4.5–5.75 300×300 4.75–16
400×400 4.5–30 500×500 4.5–30

Note: If your project requires other sizes or wall thicknesses, we offer full customization to meet your specifications.

 

Steel Grades

 

Q195, Q235, Q345 – Standard low-carbon and low-alloy steels for high strength, weldability, and formability.

Applicable Standards: GR.A, GR.B, GR.C, ASTM A500, JIS G3466, DIN EN10210/EN10219, GB/T 3094-2000, GB/T 6728-2002

info-536-393