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CSA G40.21 50A Structural Steel Plate

CSA G40.21 50A steel plate is an atmospheric corrosion-resistant, weldable structural steel plate that meets Canadian Standards Association requirements. Also referred to as 350A, this grade is commonly used in structural applications such as bridges and buildings.

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Features

  • Can be used bare or unpainted in many applications when properly exposed to the atmosphere.

  • May be certified to meet multiple standards on mill test reports, but guaranteed to meet CSA G40.21 standards.

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Product Details

Grade Thickness Width Length
CSA G40.21 50A 1/4" – 4" 48" – 120" Up to 480"
Grade Yield Point (ksi) Tensile Strength (ksi) Elongation %
50A 50 70-95 19
Carbon max 0.20%
Manganese 0.75-1.35%
Phosphorus max 0.030%
Sulfur max 0.04%
Silicon 0.15-0.50%
Copper 0.20-0.60%
Chromium max 0.70%
Nickel max 0.90%

Grade Comparison

Frequently Asked Questions

Learn more about CSA G40.21 50A steel plate.
CSA 50W and CSA 50A are both weldable CSA G40.21 structural steel plate grades with similar strength levels, but they are designed for different performance needs. CSA 50W is a weldable structural steel grade, while CSA 50A is atmospheric corrosion-resistant weldable steel. CSA 50A is typically selected when a project requires CSA G40.21 structural plate with improved atmospheric corrosion resistance for exposed applications.
CSA G40.21 50A steel plate is used in structural applications that require weldable steel with atmospheric corrosion resistance. It is commonly used for bridges, buildings and other exposed structural applications where weathering performance may be important. When properly exposed to the atmosphere, 50A steel plate may be used bare or unpainted in many applications.
In CSA G40.21 steel plate, 50A is the imperial designation and 350A is the metric designation for the same atmospheric corrosion-resistant weldable structural steel grade. The number refers to minimum yield strength, with 50A indicating 50 ksi and 350A indicating approximately 350 MPa. The “A” indicates atmospheric corrosion-resistant weldable steel.
CSA G40.21 50A is an atmospheric corrosion-resistant weldable steel grade, but Charpy impact testing is not automatically required for every order. If low-temperature notch toughness or verified Charpy performance is required, the material may need to be specified as 50AT / 350AT with the required Charpy category.