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CSA G40.21 50W Structural Steel Plate

CSA G40.21 50W steel plate is a weldable, high-strength low-alloy structural steel plate that meets Canadian Standards Association requirements. Also referred to as 350W, this grade is used in a variety of structural applications.

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Features

  • Commonly used for general construction, fabrication and structural applications.

  • Available in standard and heavy plate thicknesses.

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

  • Available to purchase online via Leeco® Pro. Click here to log on or contact us to learn more.

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Product Details

Grade Thickness Width Length
CSA G40.21 50W 1/4" – 4" 48" – 120" Up to 480"
Grade Yield Point (ksi) Tensile Strength (ksi) Elongation %
50W ≤2.5" thick 50 65-95 19
50W >2.5" thick 46 65-95 19
Carbon max 0.23%
Manganese 0.50-1.50%
Phosphorus max 0.040%
Sulfur max 0.05%
Silicon max 0.40%

Grade Comparison

Frequently Asked Questions

Learn more about CSA G40.21 50W steel plate.
CSA G40.21 50W steel plate and ASTM A572 Grade 50 are often compared because both are high-strength structural steel grades with similar yield strength levels. CSA 50W, also known as 350W, is produced to Canadian Standards Association requirements, while ASTM A572 Grade 50 is produced to ASTM requirements. In some cases, CSA 50W plate may be multi-certified with ASTM A572 Grade 50 on the mill test report (MTR) when the material satisfies both specifications. Substitution or multi-certification should be confirmed against the project specification, mechanical properties, chemistry, Charpy requirements and MTR details.
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 50W steel plate is used in structural applications that require high-strength, weldable steel meeting Canadian structural steel requirements. It is commonly used in general welded construction, bridges, cranes and other structural applications where higher yield strength is needed and low-temperature notch toughness is not the main design requirement.
In CSA G40.21 steel plate, 50W is the imperial designation and 350W is the metric designation for the same weldable structural steel grade. The number refers to minimum yield strength, with 50W indicating 50 ksi and 350W indicating approximately 350 MPa. The “W” indicates weldable steel.
CSA 44W and CSA 50W are both weldable structural steel plate grades under CSA G40.21, but 50W has a higher minimum yield strength. CSA 44W, also known as 300W, has a 44 ksi minimum yield strength, while CSA 50W, also known as 350W, has a 50 ksi minimum yield strength for applicable thickness ranges. CSA 50W is typically selected when the project requires higher strength while still meeting CSA G40.21 weldable structural steel requirements.
CSA G40.21 50W is a weldable structural steel grade and is generally used where low-temperature notch toughness is not the primary design requirement. 50W requires chemical composition and tensile testing, but Charpy impact testing is not part of the standard test schedule for this W grade. If Charpy impact testing or low-temperature toughness is required, the material may be specified as 50WT / 350WT with the required Charpy category.