Product Catalogue
SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
Sharp-corner rectangular tube, seamless and welded hollow sections, round pipe and section steel -- 2,800+ specifications, wall thickness up to 40 mm, certified for export to 50+ countries.
- 20×20 - 800×800 mm
- WT ≤ 40.0 mm
- Q195 - Q690 / S355J2
- 812+ items online
47 products found
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SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
Carbon Steel Hot Rolled Square Rectangular Hollow Section 12×12-800x1000mm Supplier
Carbon Steel Hot Rolled Square and Rectangular Hollow Section, sizes 12×12 mm to 800×1000 mm, lengths 1–12 m — hot rolled process...
Aug 3, 2026 View specs -
SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
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SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
Q235 Q345 Seamless Square Steel Pipe 20-600mm Supplier
Q235 Q345 Seamless Square Steel Pipe, 20×20–600×600 mm, wall thickness 30–500 mm — hot-rolled seamless process delivers uniform mechanical properties for heavy...
Aug 3, 2026 View specs -
SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
Q235 Q345 ERW Square Steel Pipe 10-500mm Wall 0.6-120mm Supplier
Q235 Q345 ERW Square Steel Pipe, 10×10–500×500 mm, wall thickness 0.6–120 mm — ERW welded process delivers cost-effective structural performance, available in...
Aug 3, 2026 View specs -
SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
Q195 Q235 Q355 Black Iron Square Tube RHS Steel Profile Factory Direct
Q195 Q235 Q355 Black Iron Square Tube RHS Steel Profile, wall thickness 0.6–15 mm, side length up to 3000 mm — available...
Aug 3, 2026 View specs -
SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
Q195-Q345 Black ERW Square Rectangular Steel Tube Supplier
Q195–Q345 Black ERW Square & Rectangular Steel Tube, ASTM A500 / EN 10219, sizes 20×20 to 400×400 mm, wall thickness 0.8–20 mm...
Aug 3, 2026 View specs -
SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
Q195-Q345 Seamless Square Steel Tube 20-610mm Manufacturer
Q195-Q345 Seamless Square Steel Tube, 20-610mm side length, 0.6-20mm wall thickness — hot-rolled seamless process ensures uniform strength and precise dimensions for...
Aug 3, 2026 View specs -
SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
Q235B S355 ASTM A500 Square Rectangular Steel Tube Supplier
Q235B S355 ASTM A500 Square Rectangular Steel Tube, sizes 12×12 to 800×800 mm, wall thickness 0.5–60 mm — ERW welded hollow sections...
Aug 3, 2026 View specs -
SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
S355J2H Seamless Square Rectangular Hollow Section EN10210 Manufacturer
S355J2H Seamless Square and Rectangular Hollow Section, EN 10210/10219, wall thickness up to 40 mm, ±1% tolerance — manufactured via seamless process...
Aug 3, 2026 View specs -
SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
Q235 Q345 S355JR Seamless Square Rectangular Steel Tube Custom Sizes Supplier
Q235/Q345/S355JR Seamless Square and Rectangular Hollow Section, ASTM, custom sizes with ±1% tolerance — hot rolled seamless technique delivers uniform wall thickness...
Aug 3, 2026 View specs -
SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
Q235 Q345 Q355 Carbon Steel Square Rectangular Tube Custom Sizes Manufacturer
Q235 Q345 Q355 Carbon Steel Square Rectangular Tube, 30×30–200×400 mm, wall thickness 1.5–12 mm — available in ERW and seamless processes with...
Aug 3, 2026 View specs -
SEAMLESS SQUARE AND RECTANGULAR HOLLOW SECTIONS
Q235 Q345 S355JR Rectangular Hollow Section Steel Tube ASTM Standard Supplier
Q235 Q345 S355JR Rectangular Hollow Section Steel Tube, ASTM Standard, 20×20mm – 50×50mm, wall thickness up to 40mm — hot-rolled black surface...
Aug 3, 2026 View specs
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Custom cutting, marking, mill test certificates and professional container loading included. ISO 9001:2015 · Lloyd's CE · SGS / BV verified.