1. Product Overview
SPA-H is a high-performance weathering steel (atmospheric corrosion-resistant steel) used in structural hollow sections (SHS, RHS, CHS). It forms a protective rust layer (patina) when exposed to weather, eliminating the need for painting while maintaining superior durability in harsh environments.
2. Key Features & Benefits
Superior Corrosion Resistance – 3-5× better than carbon steel in industrial/marine atmospheres
Self-Protecting Patina – Forms a stable oxide layer, preventing further corrosion
High Strength – 355 MPa min yield strength (structural integrity)
Low Maintenance – No repainting required, reducing lifecycle costs
Eco-Friendly – 100% recyclable, reduces VOC emissions from coatings
Excellent Weldability & Fabrication – Compatible with standard welding/cutting method
3. Technical Specifications
Chemical Composition (Typical %)
| Element | SPA-H | Effect |
|---|---|---|
| C | ≤0.12% | Enhances weldability |
| P | 0.07-0.15% | Accelerates protective patina formation |
| Cu | 0.25-0.55% | Improves corrosion resistance |
| Cr | 0.30-1.25% | Stabilizes rust layer |
| Si | 0.20-0.75% | Increases strength |
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (Rp0.2) | ≥355 MPa |
| Tensile Strength (Rm) | 470-630 MPa |
| Elongation (A₅) | ≥22% |
| Impact Toughness (J, -20°C) | ≥27J |
Available Sizes & Tolerances
Square (SHS): 20×20mm to 400×400mm
Rectangular (RHS): 50×25mm to 500×300mm
Circular (CHS): Ø21.3mm to Ø500mm
Wall Thickness: 1.5mm to 25mm
Length: 6m, 12m (custom lengths available)
Tolerances: EN 10219 / ASTM A1085 compliant
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