Carbon Steel Rectangular Tube — Factory Direct Supplier | Huaxia-Steel
Carbon steel rectangular tube is one of the most versatile hollow sections for construction, machinery, and structural frameworks. Its flat faces make welding and bolting simple, while the closed section provides excellent torsional stiffness. Huaxia-Steel supplies rectangular hollow sections (RHS) in ERW and seamless execution to ASTM A500, EN 10219, and JIS G3466.
Product Overview
We produce and source carbon steel rectangular tube in a wide size range. Common finishes include black, galvanized, and pre-painted. We can cut tubes to length, deburr ends, and apply protective caps for export.
Specifications
| Item | Details |
|---|---|
| Standard | ASTM A500, EN 10219, JIS G3466 |
| Grades | ASTM A500 Gr.B/C, S235JR, S275JR, S355JR, SS400 |
| Size (H×W) | 20×10 mm – 400×200 mm |
| Wall thickness | 1.0 mm – 16 mm |
| Length | 5.8 m, 6 m, 11.8 m, 12 m (custom) |
| Corner radius | Per standard or buyer’s drawing |
| Surface | Black, oiled, hot-dip galvanized, pre-painted |
Available Grades
- S235JR – general structural use
- S275JR – higher strength frames
- S355JR – heavy load-bearing structures
- ASTM A500 Gr.B – North American structural
- ASTM A500 Gr.C – higher yield structural
- SS400 – Asian general-purpose
Manufacturing Standards
- ASTM A500/A500M (cold-formed welded and seamless carbon steel structural tubing)
- EN 10219 (cold formed welded structural hollow sections)
- JIS G3466 (carbon steel square and rectangular tubes for general structure)
- ASTM A53 (for pressure applications if specified)
Applications
- Building frames and roof trusses
- Machinery guards and conveyors
- Solar panel mounting structures
- Vehicle chassis and trailer frames
- Fencing, racking, and shelving
Quality Assurance
Each batch is tested for dimensions, squareness, straightness, tensile properties, and weld integrity. ERW tubes receive eddy-current or ultrasonic weld inspection. Mill test certificates are provided with every shipment.
Packing and Shipping
Rectangular tubes are bundled in hexagonal or square packs, tied with steel straps, and protected with oilpaper or plastic film. Galvanized tubes are separated to avoid white-rust contact. We pack for container, flat rack, or bulk shipment.
Why Buy Carbon Steel Rectangular Tube from Huaxia-Steel?
- Wide size range in stock and mill-order
- ERW and seamless options
- Galvanized and painted finishes available
- Cut-to-length and end preparation
- Mill-direct pricing and export documentation
Request a quote for carbon steel rectangular tube. Tell us the dimensions, grade, finish, quantity, and destination, and we will respond with a detailed proposal.
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