Seamless Square & Rectangular Carbon Steel Tubes

Precision Shaped · Steel the Future

High-Precision Seamless Square & Rectangular Carbon Steel Tubes | Full EN-Compliant

In high-end structural manufacturing and precision engineering, the synergy of dimensional accuracy and material integrity determines project success. What we offer is not just steel tubes-but a European-standard-certified seamless carbon steel solution for square and rectangular profiles.

▎ Genuinely Seamless, Superior Toughness
Manufactured from premium carbon steel via cold-drawn or hot-rolled seamless processes-eliminating weld defects entirely. Uniform wall thickness and dense grain structure deliver outstanding performance under pressure, bending, and dynamic loads, with a service life far exceeding that of welded alternatives.

▎ Full EN Standard Process Control
From melt chemistry to final dimensional inspection, strictly compliant with EN 10210 (hot-finished) and EN 10219 (cold-formed). Supplied with complete EN 10204 Type 3.1/3.2 mill test certificates, ensuring global traceability and batch-to-batch consistency.

▎ High Precision – Ready for Assembly
We push beyond conventional tolerances:

Wall thickness tolerance: within ±10%

Straightness: ≤1.0mm/m (custom ≤0.5mm/m)
Achieve "near-net shape" delivery, significantly reducing your secondary machining costs and material waste.

▎ Full Range of Square & Rectangular Sizes
Side dimensions: 10×10 mm up to 600×600 mm (rectangular equivalents available)
Wall thickness: 0.5 mm – 20 mm
Value-added services include cut-to-length, chamfering, deburring-ready for installation upon arrival.

●  Construction machinery booms and chassis frames

●  PV/wind power support trusses

●  Precision machine tool bases and guide rail skeletons

●  Load-bearing keels for architectural curtain walls

●  Tube bundle supports in petrochemical heat exchangers

✔ 20+ years of seamless tube finishing expertise, with imported cold-drawing lines
✔ In-house physical & chemical lab; 100% eddy current + ultrasonic flaw detection
✔ Flexible MOQ; 7–15 days fast delivery
✔ Export-grade packaging for sea/land transport, anti-rust and impact-protected

Let precision define your height, and standards become your habit.

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