Overview:
The ASTM A606 steel sheet is a highly durable, corrosion-resistant material commonly referred to as Weathering Steel or Corten Steel. It is known for its ability to form a stable rust-like appearance that protects it from further corrosion. This material is widely used in structural and construction applications where prolonged exposure to the elements is expected. Available in three types—Type II, Type IV, and Type V—it offers varying levels of corrosion resistance and mechanical properties. Leeco® Steel primarily supplies hot-rolled ASTM A606 sheets, which provide enhanced strength and durability for demanding environments.
Key Benefits:
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Corrosion Resistance: Highly resistant to rust and other forms of corrosion, making it ideal for outdoor and exposed structures.
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Durability: A606 steel exhibits high tensile strength and elongation, ensuring it can withstand challenging environments.
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Variety of Grades: Available in Type II, Type IV, and Type V, each tailored for specific needs.
Types of ASTM A606 Steel Sheet
| Type | Description | Common Uses |
|---|---|---|
| Type II | Standard corrosion-resistant steel with base elements like copper. | Outdoor structural applications, building facades. |
| Type IV | Similar to Type II but may contain additional alloying elements. | Bridge components, agricultural structures. |
| Type V | Contains higher amounts of alloying elements, including nickel. | Marine environments, severe weather conditions. |
Available Sizes of ASTM A606 Steel Sheet
Leeco® Steel stocks ASTM A606 steel sheets in standard sizes, with the option to customize dimensions for special orders.
| Grade | Thickness | Width | Length |
|---|---|---|---|
| A606 Type II & IV | 3/16″ – 3/4″ | 48″ – 96″ | Up to 480″ |
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Thickness range: 3/16″ to 3/4″
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Width range: 48″ to 96″
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Length range: Up to 480″ (custom sizes available)
Material Properties
The mechanical properties of ASTM A606 steel sheets, based on ASTM specifications, ensure its suitability for tough structural applications. These include the yield point, tensile strength, and elongation properties that are crucial for long-term performance.
| Grade | Yield Point (ksi) | Tensile Strength (ksi) | Min. 2” Elongation (%) |
|---|---|---|---|
| Type II & IV – As-rolled | 50 | 70 | 22 |
| Type II & IV – Annealed | 45 | 65 | 22 |
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Type II & IV (As-rolled): Yield point of 50 ksi, tensile strength of 70 ksi, and elongation of 22%.
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Type II & IV (Annealed/Normalized): Lower yield point (45 ksi) and tensile strength (65 ksi) for enhanced formability.
Chemical Composition
The chemical composition of ASTM A606 steel varies based on the type, with each type tailored to different environmental and structural demands. The table below outlines the key elements in Type II, Type IV, and Type V.
| Element | Type II & IV | Type V |
|---|---|---|
| Carbon (C) | 0.22% | 0.09% |
| Manganese (Mn) | 1.25% | 0.70-0.95% |
| Sulfur (S) | 0.04% | 0.010% |
| Copper (Cu) | 0.20% min | 0.65-0.98% |
| Nickel (Ni) | – | 0.52-0.76% |
| Chromium (Cr) | – | 0.30% |
| Silicon (Si) | – | 0.40% |
| Titanium (Ti) | – | 0.015% |
| Vanadium (V) | – | 0.015% |
| Niobium (Nb) | – | 0.08% |
| Phosphorus (P) | – | 0.025% |
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Type II & IV: Standard alloying elements like copper and manganese, offering solid corrosion resistance.
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Type V: More advanced alloying with nickel, chromium, and titanium for extreme environments like marine and high-corrosion areas.
Comparison: ASTM A606 Type II vs Type V
| Feature | Type II | Type V |
|---|---|---|
| Carbon Content | 0.22% | 0.09% |
| Copper Content | 0.20% min | 0.65-0.98% |
| Nickel Content | – | 0.52-0.76% |
| Chromium Content | – | 0.30% |
| Best Use | Standard structures | Marine, severe weather |
| Corrosion Resistance | Good | Excellent |