High-Strength Welded Rectangular Tubes: Structural Solutions for Industrial & Architectural Applications.
ERW-Formed Rectangular Hollow Sections (RHS) with Precision Joining Surfaces.
Manufactured through advanced Electric Resistance Welding (ERW) technology, our rectangular tubes deliver flat-profile efficiency for structural frameworks. Available in 80×40mm to 600×300mm dimensions with wall thicknesses from 1.6mm–12.7mm, these ASTM A500-certified tubes support loads up to 650 MPa yield strength. Flat surfaces reduce welding prep time by 30% vs. circular HSS.
Key Specifications & Certifications
- Materials:
Type Grades Key Features Carbon Steel ASTM A500 Gr B/C Cost-effective construction Stainless Steel AISI 304/316 Corrosion-resistant cladding Weathering Steel ASTM A847 Unpainted outdoor durability - Tolerances:
- Outer Dimensions: ±1mm (width/depth)
- Wall Thickness: ±10%
- Straightness: ≤1.5mm/m
Standard Sizes & Weight Chart
| Dimensions (W×H×t) | Weight (kg/m) | Load Capacity (kN/m) | Common Applications |
|---|---|---|---|
| 150×100×6.3mm | 22.4 | 185 | Mezzanine floor beams |
| 160×80×4.0mm | 14.3 | 92 | Conveyor system frameworks |
| 200×50×5.0mm | 18.1 | 134 | Solar panel mounting racks |
Custom Sizing:
- Max Width: 600mm | Min Thickness: 1.6mm (16 gauge)
- Cut-to-Length: ±2mm accuracy | Hole Punching: ±0.5mm tolerance
Mechanical Properties & Surface Treatments
| Grade | Yield Strength (MPa) | Surface Finish Options |
|---|---|---|
| A500 Gr B | 345 | Mill finish, galvanized (G90) |
| AISI 304 | 205 | Brushed, electropolished |
| A847 | 345 | Self-healing patina (50+ yrs) |
Certifications:
- EN 10219: Cold-formed welded structural hollow sections.
- ISO 1461: Hot-dip galvanizing for rust prevention.
Applications Across Industries
- Construction:
- Steel Framing: 150×100×6.3mm tubes for modular warehouses (15m spans).
- Stair Stringers: 120×60×4mm powder-coated RHS with slip-resistant treads.
- Manufacturing:
- Robotic Arms: 80×40×3.2mm precision tubes (±0.3mm straightness).
- Renewable Energy:
- Solar Farms: Galvanized 200×50×5mm racks (ISO 12944 C4 Marine rating).
Product Show
Supplier of various types of carbon steel
Luo Kaiwei Steel Company is a comprehensive steel supplier that produces a variety of carbon steel plates, carbon steel pipes, galvanized steel, carbon steel coils, and steel profiles.
