• ISO 9001
• EU CE
• SGS / BV
• Factory Direct

WELDED SQUARE AND RECTANGULAR STEEL TUBE

ASTM A500 Welded Square Steel Tube Q235 S355 10-600mm Factory Direct

Q235 Q345 S355 ASTM A500 Welded Square Steel Tube, 10×10–600×600 mm, wall thickness 0.8–30 mm — ERW process with ±1% tolerance ensures dimensional accuracy for structural framing. Available in bare, pre-galvanized, or hot-dipped galvanized finishes to match corrosion resistance requirements across construction and machinery applications. Factory-direct supply with original mill test certificates, CE & ISO certification, and third-party inspection (SGS/BV) for smooth customs clearance to 50+ countries.

MOQ

Flexible · mixed container

Certification

ISO · CE · SGS · BV

Customization

Non-standard sizes

Export

50+ countries