Product & process
From strip to strapped bundle
Square and rectangular hollow sections rolled in-house, cut and coated to spec, packed for container loading.
Illustrations generated for this site.
Cut, drilled, galvanised and painted in-house. Every bundle ships with an EN 10204 3.1 mill certificate.
Product range
Square and rectangular hollow sections in structural, automotive and weathering grades — plus the secondary operations that turn tube into a finished part.
Wall 1.5–16 mm · 6/9/12 m or cut to length
Rectangular tubeStructural RHS for frames, purlins and trailers
Special gradesHigh strength, automotive and weathering steels
ProcessingLaser cut, punch, hot-dip galvanising, painting
Size matrix
Representative sizes from the 80, 100, 130, 200 and 400 square lines. Anything in between is quoted on request.
| Section (mm) | Wall (mm) | Weight (kg/m) | Production line | Stock |
|---|---|---|---|---|
| 30×30 | 1.5 – 3.0 | 1.32 – 2.54 | Cold-formed | On request |
| 50×50 | 2.0 – 5.0 | 3.01 – 7.11 | Cold-formed | Stock |
| 80×80 | 2.5 – 6.0 | 6.04 – 13.9 | 80 | Stock |
| 100×100 | 3.0 – 8.0 | 9.02 – 23.2 | 100 | Stock |
| 130×130 | 4.0 – 10.0 | 15.7 – 37.7 | 130 | Stock |
| 200×200 | 6.0 – 12.0 | 36.3 – 70.9 | 200 | Stock |
| 300×300 | 8.0 – 14.0 | 72.8 – 125 | 400 | Made to order |
| 400×400 | 10.0 – 16.0 | 121 – 191 | 400 | Made to order |
Weights are theoretical (7.85 g/cm³). Tolerances per GB/T 6728, EN 10219 or ASTM A500 as specified.
Stock sizes leave within three days. Cut-to-length, drilled and coated parts are scheduled against your vessel date — and every bundle carries its heat number.
Photo: Everettbri / Wikimedia Commons, CC BY-SA 4.0
Steel grades
From plain Q235B to 700 MPa automotive tube and SPA-H weathering steel — including the "special material" grades that most stockists will not hold.
Production
Each line is dedicated to a section band, so changeover cost stays out of your price and wall-thickness consistency stays in it.
High-frequency welded, 2.5–8 mm wall, 6–12 m lengths. Runs structural and automotive grades.
Mid-band line for purlins, columns and machine frames; 4–10 mm wall.
Heavy structural band, 6–12 mm wall, squareness and twist held to GB/T 6728.
Large-section line up to 400×400, 10–16 mm wall, for portal frames and heavy plant.
Chemistry, tensile, flattening and dimensional checks on every heat; third-party SGS/BV on request.
Qingdao/Tianjin loading within 3–7 days; container or break-bulk packing to your marking spec.
Where it goes
Product & process
Square and rectangular hollow sections rolled in-house, cut and coated to spec, packed for container loading.
Illustrations generated for this site.
Technical guides
Short notes from our quotation desk: grades, wall thickness, standards, and what goes wrong on a first container.
Quotation
Tell us section, wall, grade, length and quantity. If you have a tolerance or a coating spec, attach it — the quote will follow your standard, not ours.