
Square Steel Tube
Grades Q235B, Q345B, S235JR
Spec 20×20 – 200×200 mm · Wall 1.2–8 mm
Cold-formed square hollow sections with square-cut ends.
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MOQ 5 tonnes per size. Specification parity: any grade, size, tolerance or standard published by a peer mill, we quote the same specification — send the reference page with your enquiry.

Grades Q235B, Q345B, S235JR
Spec 20×20 – 200×200 mm · Wall 1.2–8 mm
Cold-formed square hollow sections with square-cut ends.
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Grades Q235B, S355JR
Spec 20×40 – 100×200 mm · Wall 1.2–8 mm
Rectangular hollow sections for frames, gates and machinery.
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Grades Q235B, DX51D
Spec 20×20 – 150×150 mm · Wall 1.2–5 mm
Pre-galvanized square tube with corrosion-resistant finish.
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Grades Q235B, S235JR
Spec 15 x 15 – 100 x 100 mm · Wall 0.8–2.0 mm
Light gauge square tube for furniture, shopfitting and light frames.
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Grades Q235B, Q345B
Spec 50 x 50 – 300 x 300 mm · Wall 4–16 mm
Heavy wall square section for machine bases and load bearing frames.
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Grades Q235B, DX51D
Spec 20 x 20 – 200 x 200 mm · Wall 1.5–8 mm
Square tube galvanized after forming for outdoor structural use.
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Grades Q235B, DX51D
Spec 20 x 40 – 200 x 400 mm · Wall 1.2–8 mm
Galvanized rectangular section for gates, fences and greenhouse frames.
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Grades Q235B, S235JR
Spec 10 x 20 – 100 x 200 mm · Wall 0.8–2.0 mm
Light rectangular tube for partitions, racking and display frames.
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Grades Q195, SPCC
Spec OD 16–63 mm · Wall 0.8–1.6 mm
Thin wall conduit for electrical installation, supplied plain or galvanized.
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Grades Q235B, DX51D
Spec OD 15–219 mm · Wall 1.0–8 mm
Round galvanized pipe for water lines, fencing and handrails.
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Grades Q235B, SS400
Spec OD 21.3–610 mm · Wall 1.5–16 mm
Electric resistance welded pipe for general structural and conveying duty.
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Grades API 5L Gr.B, X42
Spec OD 114.3–610 mm · Wall 4–25 mm
High frequency welded line pipe for lower pressure gathering and water lines.
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Grades Q235B, S235JR
Spec OD 48.3 mm · Wall 3.0–4.0 mm · Length 1–6 m
Scaffold tube in standard lengths, supplied with or without couplers.
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Grades Q235B, DX51D
Spec OD 22–60 mm · Wall 1.0–2.5 mm
Galvanized tube formed for greenhouse arches and purlins, packed by frame size.
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Grades Q195, SPCC
Spec OD 12–50 mm · Wall 0.6–1.5 mm
Smooth surface tube for furniture frames, powder coated after forming.
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Grades Q235B, Q345B
Spec 20 x 20 – 400 x 400 mm · Wall 1.5–20 mm
Cold formed hollow section to EN 10219 for structural frames.
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Grades Q195, Q235B
Spec OD 10–76 mm · Wall 0.6–3.0 mm
Annealed tube for bending and flaring without cracking, used in refrigeration and furniture.
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