1. Product Parameters
Q215B is a carbon structural steel pipe under GB/T 700-2006, with the following key technical data:
| Parameter | Value/Description |
|---|---|
| Material Grade | Q215B (carbon steel, improved sulfur/phosphorus control) |
| Yield Strength | ≥215 MPa (varies with thickness) |
| Tensile Strength | 335–450 MPa |
| Elongation (%) | ≥13% (for thickness ≤16mm) |
| Chemical Composition | C ≤0.15%, Mn 0.25–0.50%, S ≤0.045%, P ≤0.045% |
| Outer Diameter | 21.3–508 mm (0.84–20 inches) |
| Wall Thickness | 2.0–4.5 mm (varies by application) |
| Surface Treatment | Hot-dip galvanized (optional) |
| Standards | GB/T 700-2006, GB/T 3091 (China) |
2. Applications
Construction: Non-load-bearing structures (e.g., scaffolding, roofing)
Fluid Transport: Water, gas, and low-pressure pipelines
Mechanical Parts: Bolts, rivets, and low-strength components
Decorative Uses: Handrails, fences, and art installations
3. Advantages
Cost-Effective: Lower carbon content reduces material costs compared to Q235/Q345
Ease of Processing: Excellent weldability and cold bend performance (180° test)
Corrosion Resistance: Galvanized coating extends service life in humid environments
Versatility: Suitable for both structural and non-structural applications
4. Comparison with Similar Grades
| Property | Q215B | Q235B | Q345 |
|---|---|---|---|
| Yield Strength | ≥215 MPa | ≥235 MPa | ≥345 MPa |
| Carbon Content | ≤0.15% | ≤0.22% | ≤0.20% |
| Typical Use | Light structures | General construction | Heavy-load structures |
| Price | Lower | Moderate | Higher |
Note: Q215B is ideal for lightweight applications where high strength is not critical, while Q345 is preferred for heavy-duty scenarios like bridges or pressure vessels
