What is CSA G40.21 Steel Plate?
CSA G40.21 steel plate is a structural steel grade specifically designed to meet Canadian building and construction requirements. It is commonly used in the fabrication of bridges, buildings, transmission towers, and other heavy-duty structures. The steel offers excellent weldability, formability, and strength, making it ideal for use in environments where strength and reliability are paramount.
The steel is produced to meet Canadian standards, which are similar to international specifications, making it suitable for both domestic and international projects. It is available in various thicknesses, widths, and lengths to suit different project needs.
Material Properties of CSA G40.21 Steel Plate
CSA G40.21 steel plate offers excellent mechanical properties that make it suitable for high-performance structural applications. Below is an overview of the material properties for each grade of CSA G40.21 steel:
| Grade | Thickness Range | Yield Point (ksi) | Tensile Strength (ksi) | Elongation (%) |
|---|---|---|---|---|
| 44W | ≤ 2.5″ thickness | 44 | 64-90 | 20 |
| 44W | > 2.5″ and ≤ 4″ thickness | 40 | 64-90 | 20 |
| 50W | All thicknesses | 50 | 65-95 | 19 |
| 50A | All thicknesses | 50 | 70-95 | 19 |
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Grade 44W: Offers excellent formability with high elongation, making it suitable for applications requiring moderate strength.
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Grade 50W: Provides a higher yield point and tensile strength, offering enhanced structural integrity for critical applications.
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Grade 50A: Features higher strength than Grade 50W, with added elements like Chromium and Nickel to improve toughness and corrosion resistance.
Chemical Composition of CSA G40.21 Steel Plate
The chemical composition of CSA G40.21 steel plate varies slightly depending on the grade. Below is the breakdown of the chemical composition for each grade:
| Element | Grade 44W | Grade 50W | Grade 50A |
|---|---|---|---|
| Carbon (C) | 0.22% | 0.23% | 0.20% |
| Manganese (Mn) | 0.50-1.50% | 0.50-1.50% | 0.75-1.35% |
| Phosphorus (P) | 0.04% | 0.04% | 0.03% |
| Sulfur (S) | 0.05% | 0.05% | 0.04% |
| Silicon (Si) | 0.40% | 0.40% | 0.15-0.50% |
| Chromium (Cr) | — | — | 0.70% |
| Nickel (Ni) | — | — | 0.90% |
| Copper (Cu) | — | — | 0.20-0.60% |
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Carbon: The carbon content is controlled to provide a balance of strength and weldability. Grade 50A has the lowest carbon content for improved toughness.
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Manganese: Manganese is present in all grades to enhance strength and improve toughness. Grade 50A has the highest range of manganese for additional strength.
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Phosphorus and Sulfur: Both elements are limited to prevent brittleness and ensure better workability and toughness.
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Chromium, Nickel, Copper: These elements are found in Grade 50A to improve corrosion resistance and overall toughness, making it suitable for more demanding environments.
Available Sizes of CSA G40.21 Steel Plate
Leeco® Steel offers CSA G40.21 steel plates in various standard sizes to meet the diverse needs of customers. Special sizes can be ordered upon request.
| Grade | Thickness | Width | Length |
|---|---|---|---|
| 44W | 1/4″ – 4″ | 48″ – 120″ | Up to 480″ |
| 50W | 1/4″ – 4″ | 48″ – 120″ | Up to 480″ |
| 50A | 1/4″ – 4″ | 48″ – 120″ | Up to 480″ |
Conclusion
CSA G40.21 steel plate is an excellent choice for a variety of structural applications, offering a combination of strength, formability, and weldability. Whether you require the moderate strength of Grade 44W or the enhanced strength and toughness of Grade 50A, CSA G40.21 steel provides reliable performance in critical construction and manufacturing projects.
For more details or to place an order, contact Shanxi Luokaiwei Steel Company. Our team will assist you in selecting the right material for your specific application and provide you with a competitive quote.
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