Product Definition:
ASTM A588 weathering steel square bars are precision-formed structural elements that combine exceptional atmospheric corrosion resistance with superior load-bearing capacity. These square-profile bars develop a self-renewing protective oxide layer when exposed to environmental conditions, making them ideal for both structural and decorative applications.
Unique Value Proposition:
Architectural-Grade Weathering: Develops a uniform, stable patina with consistent coloration on all four surfaces
Structural Versatility: Square profile provides optimal contact surfaces for fabrication and joining
Dimensional Stability: Maintains geometric integrity under stress better than round profiles
Technical Superiority:
▸ Enhanced corner strength with controlled radius edges (typically 1-2mm)
▸ Superior flatness tolerance: ≤0.5% of width over 3m length
▸ Improved surface consistency with specialized rolling process
▸ Available in hot-rolled and precision-ground finishes
Material Specifications Table:
| Parameter | Specification |
|---|---|
| Standard | ASTM A588 Grade K |
| Edge Condition | Sharp (90°) or radiused (customizable) |
| Surface Quality | Class A (architectural) or Class B (structural) |
| Straightness | ≤1mm/m for precision grades |
Available Configurations:
• Standard Sizes: 10mm×10mm to 200mm×200mm
• Special Profiles:
Tapered squares (architectural applications)
Hollow structural squares (HSS compatible)
Fluted surface options (anti-slip properties)
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