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Galvanized Steel Rectangular Tube
Galvanized Steel Rectangular Tube
Galvanized steel rectangular tube, also known as galvanized square tube or galvanized RHS (Rectangular Hollow Section), is a rectangular steel pipe typically produced using Electric Resistance Welding (ERW) technology and coated with a protective zinc layer. Its unique shape offers excellent bending and torsional strength, making it suitable for structural supports, frameworks, beams, and columns. This shape also provides a cleaner visual appearance and makes welding and flush installation easier. Because of these benefits, it is an essential component in the construction industry.
If you’re seeking long-lasting corrosion protection, outdoor suitability, strong structural integrity, and high-quality performance, our hot-dip galvanized ERW steel rectangular tube is certainly the right choice for your project.
If you’re seeking long-lasting corrosion protection, outdoor suitability, strong structural integrity, and high-quality performance, our hot-dip galvanized ERW steel rectangular tube is certainly the right choice for your project.
Product Specifications
| Category / Property | Description & Common Ranges / Standards |
| Base Material Grades | ASTM A500 Gr B/C, EN 10219 S235JRH/S355J2H, GB/T 6728 Q235B/Q345B |
| Zinc Coating Weight（Hot-Dip Galvanizing） | Standard: 2.0 ounces per square foot (oz/ft2) total (approx. 610 g/m2). |
| Welding Technique | ERW – Electric Resistance Welded |
| Outer Dimensions | Square: 20x20mm to 400x400mm; Rectangular: 20x30mm to 300x500mm. |
| Wall Thickness | 1.5mm to 16mm |
| Standard Lengths | 6m, 12m (or custom). |
| Mechanical Properties (of Base Steel) | (Values vary significantly by steel grade) – Tensile Strength: E.g., ASTM A500 Grade B: 400 MPa (58 ksi) min. – Yield Strength: E.g., ASTM A500 Grade B: 317 MPa (46 ksi) min. – Elongation: Min. percentage varies (e.g., 23% in 2″ for A500 Grade B). |
| End Finish | Plain End (square cut). |
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More Details
Advantages
Excellent Corrosion Resistance:
The galvanized coating effectively prevents rust, making it ideal for outdoor and humid environments.
High Strength and Stability:
The rectangular cross-section offers superior load-bearing capacity and structural stability.
Wide Applicability:
Customizable dimensions and wall thickness provide great flexibility to meet various requirements.
Applications
Constructing structural supports, framing, pergolas, billboard frames, fences, traffic facilities, and manufacturing machinery.
Agricultural greenhouse structures, furniture production, and decorative projects.
Manufacturing Process
Galvanized steel rectangular tubes are produced in two key stages:
- ERW Tube Formation:A flat steel coil is unrolled, shaped into a rectangular profile, and its edges are high-frequency welded. The tube is then sized, straightened, and cut.
- Hot-Dip Galvanizing:The prepared rectangular tube is immersed in molten zinc to form a protective zinc-iron alloy coating, then cooled and inspected.
