Products Description
ASTM A588 Corrosion Resistant Plate is a high-strength, low-alloy structural steel specification designed for structural steel shapes like angles, channels, beams, steel plates, and bars. It offers improved atmospheric corrosion resistance, making it suitable for applications where weight savings, durability, and extended lifecycle are important factors.
ASTM A606-4 Corrosion Resistant Plate is a high-strength, low-alloy specification designed for hot and cold rolled steel sheet, strip, and coil. It is intended for structural and miscellaneous purposes where weight savings and enhanced durability are critical factors.
Key Features
A588 provides significantly better atmospheric corrosion resistance compared to carbon steels such as A36 and A572-50, with or without copper addition. This makes it suitable for many applications even in unpainted conditions.
ASTM A588 has a minimum yield strength of 50 ksi (kilo-pounds per square inch) and a minimum tensile strength of 70 ksi. This high strength ensures structural integrity and load-bearing capability in various environments.
A606-4 offers superior atmospheric corrosion resistance compared to carbon steels, with or without copper addition. This makes it suitable for many applications without requiring paint.
A606-4 contains additional alloying elements that contribute to its enhanced corrosion resistance and mechanical properties.
ASTM A606-4 has a minimum yield strength of 50 ksi (kilo-pounds per square inch) and a minimum tensile strength of 70 ksi. This high strength ensures structural integrity and load-bearing capability in various environments.
Chemical Composition Comparison
| Element | A588 (ASTM A588 / Corten Steel) | A606 (ASTM A606 / Weathering Steel Sheet) |
|---|---|---|
| Carbon (C) | 0.19% max | 0.12% max |
| Manganese (Mn) | 0.90–1.40% | 0.80–1.25% |
| Phosphorus (P) | 0.040% max | 0.040% max |
| Sulfur (S) | 0.030% max | 0.030% max |
| Silicon (Si) | 0.25–0.75% | 0.25–0.50% |
| Copper (Cu) | 0.25–0.55% | 0.20–0.55% |
| Other Alloying Elements | Nb, Ti, Cr (trace) | Cr, Ni (trace) |
Physical Properties Comparison
| Property | A588 (ASTM A588 / Corten Steel) | A606 (ASTM A606 / Weathering Steel Sheet) |
|---|---|---|
| Yield Strength | 345 MPa min | 310–345 MPa |
| Tensile Strength | 470–630 MPa | 450–585 MPa |
| Elongation | ≥20% | ≥21% |
| Impact Toughness | 27 J @ -20°C | 27 J @ -20°C |
Application
A588 Applications:
- Bridges: Main girders, trusses, and towers, capable of supporting heavy traffic loads while resisting wind, rain, and industrial pollution.
- Industrial Buildings and High-Rise Steel Frames: Columns, beams, and load-bearing frames for factories, warehouses, and skyscrapers, ensuring long-term structural stability.
- Storage Tanks and Containers: Large chemical, water, and oil tanks exposed to outdoor conditions, where corrosion resistance and strength are critical.
- Offshore Platforms and Ports: Structural components for oil rigs, docks, and harbor equipment that face salty or humid environments.
- Heavy Machinery and Transport Vehicles: Frames and load-bearing parts for cranes, construction vehicles, and industrial equipment.
A606 Applications :
- Building Facades and Roofs: Exterior walls, roofing panels, cladding, and canopies where corrosion resistance and natural weathered appearance are important.
- Lightweight Structural Components: Balconies, fences, shade structures, and outdoor furniture that require easy forming and installation.
- Public Infrastructure: Parking shelters, bus stops, and street facilities that are exposed to weather and require low maintenance.
- Traffic Signs and Poles: Durable in coastal or high-humidity areas, reducing repainting and corrosion maintenance.
- Thin Sheet Containers: Small storage tanks for non-aggressive liquids, where corrosion resistance is needed but structural load is moderate.
Summary Comparison
A588: Strength-focused, suited for thick, heavy-duty, load-bearing structures with long-term exposure to harsh environments. Ideal for bridges, industrial frameworks, offshore platforms, and large storage tanks.
A606: Formability-focused, ideal for thin sheets, light-duty structures, and architectural or decorative applications. Best for building facades, roofing, canopies, outdoor furniture, and light containers.
