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Introduction
CSA G40.21 covers structural
quality steel products manufactured for applications requiring reliable
strength, toughness, weldability, and durability. These structural steels are
available in plates, sheets, floor plates, and bars and are widely used in
construction, infrastructure, bridges, industrial structures, heavy equipment,
and general engineering applications.
CSA G40.21 structural steel
products are designed to provide dependable mechanical performance under
demanding service conditions. Depending on the specified grade, these steels
offer different combinations of strength, toughness, atmospheric corrosion
resistance, and weldability.
Ladhani Metal Corporation is
a manufacturer, supplier, and exporter of CSA G40.21 Structural Quality Steel
Plates, Sheets, Floor Plates & Bars, supplying high-quality structural
steel products in various grades, sizes, thicknesses, and customized dimensions
for construction and engineering applications worldwide.
Applicable Standard
Standard Specification: CSA
G40.21
Organization: Canadian
Standards Association (CSA)
Title: Structural Quality
Steel
This specification covers
structural quality steel products used for buildings, bridges, industrial
structures, machinery, transportation equipment, and other engineering
applications.
Forms of Supply
CSA G40.21 structural steel
is supplied in the following forms:
• Structural Steel Plates
• Steel Sheets
• Floor Plates
• Flat Bars
• Round Bars
• Square Bars
• Structural Bars
• Cut-to-Size Plates
• Custom Fabricated Sections
• Machining-Ready Materials
Grades Covered Under CSA G40.21
38W | 44W | 50W | 55W | 60W | 70W | 80W | 38WT | 44WT | 50WT | 60WT | 70WT |
80WT | 50R | 50A | 60A | 70A | 80A | 50AT | 60AT | 70AT | 80AT | 100Q | 100QT
Supply Condition
• As Rolled Condition
• Hot Rolled Condition
• Normalized Condition
• Controlled Rolled Condition
• Heat Treated Condition
• Quenched and Tempered Condition
• Stress Relieved Condition
• Fabrication-Ready Condition
Surface Finish
• Mill Finish
• Hot Rolled Finish
• Pickled Finish
• Shot Blasted Finish
• Smooth Finish
• Floor Plate Patterned Finish
• Protective Coated Finish
Standard Sizes
Plates & Floor Plates
Thickness: 3 mm to 300 mm
Width: Up to 3000 mm
Length: Up to 12000 mm
Sheets
Thickness: 0.5 mm to 6 mm
Width: Up to 2000 mm
Length: Custom Lengths
Bars
Diameter: 6 mm to 500 mm
Length: Up to 6000 mm
Custom thicknesses, widths,
lengths, dimensions, and cut-to-size products are available according to
customer requirements.
Chemical Composition of CSA G40.21
|
Grade |
Carbon max |
Manganese |
Phosphorous |
Sulfur max |
Silicon |
Chromium |
Nickel |
Copper |
|
38W |
0.20 |
0.50–1.50 |
0.04 max |
0.05 |
0.40 max |
— |
— |
— |
|
44W |
0.22 |
0.50–1.50 |
0.04 max |
0.05 |
0.40 max |
— |
— |
— |
|
50W |
0.23 |
0.50–1.50 |
0.04 max |
0.05 |
0.40 max |
— |
— |
— |
|
55W |
0.23 |
0.50–1.50 |
0.04 max |
0.05 |
0.40 max |
— |
— |
— |
|
60W |
0.23 |
0.50–1.50 |
0.04 max |
0.05 |
0.40 max |
— |
— |
— |
|
70W |
0.26 |
0.50–1.50 |
0.04 max |
0.05 |
0.40 max |
— |
— |
— |
|
80W |
0.15 |
1.75 max |
0.04 max |
0.05 |
0.40 max |
— |
— |
— |
|
38WT |
0.20 |
0.80–1.50 |
0.03 max |
0.04 |
0.15–0.40 |
— |
— |
— |
|
44WT |
0.22 |
0.80–1.50 |
0.03 max |
0.04 |
0.15–0.40 |
— |
— |
— |
|
50WT |
0.22 |
0.80–1.50 |
0.03 max |
0.04 |
0.15–0.40 |
— |
— |
— |
|
60WT |
0.22 |
0.80–1.50 |
0.03 max |
0.04 |
0.15–0.40 |
— |
— |
— |
|
70WT |
0.26 |
0.80–1.50 |
0.03 max |
0.04 |
0.15–0.40 |
— |
— |
— |
|
80WT |
0.15 |
1.75 max |
0.03 max |
0.04 |
0.15–0.40 |
— |
— |
— |
|
50R |
0.16 |
0.75 max |
0.05–0.15 |
0.04 |
0.75 max |
0.30–1.25 |
0.90 max |
0.20–0.60 |
|
50A |
0.20 |
0.75–1.35 |
0.03 max |
0.04 |
0.15–0.50 |
0.70 max |
0.90 max |
0.20–0.60 |
|
60A |
0.20 |
0.75–1.35 |
0.03 max |
0.04 |
0.15–0.50 |
0.70 max |
0.90 max |
0.20–0.60 |
|
70A |
0.20 |
1.00–1.60 |
0.025 max |
0.035 |
0.15–0.50 |
0.70 max |
0.25–0.50 |
0.20–0.60 |
|
80A |
0.15 |
1.75 max |
0.025 max |
0.035 |
0.15–0.50 |
0.70 max |
0.25–0.50 |
0.20–0.60 |
|
50AT |
0.20 |
0.75–1.35 |
0.03 max |
0.04 |
0.15–0.50 |
0.70 max |
0.90 max |
0.20–0.60 |
|
60AT |
0.20 |
0.75–1.35 |
0.03 max |
0.04 |
0.15–0.50 |
0.70 max |
0.90 max |
0.20–0.60 |
|
70AT |
0.20 |
1.00–1.60 |
0.025 max |
0.035 |
0.15–0.50 |
0.70 max |
0.25–0.50 |
0.20–0.60 |
|
80AT |
0.15 |
1.75 max |
0.025 max |
0.035 |
0.15–0.40 |
0.70 max |
0.25–0.50 |
0.20–0.60 |
|
100Q |
0.20 |
1.50 max |
0.03 max |
0.04 |
0.15–0.40 |
— |
— |
— |
|
100QT |
0.20 |
1.50 max |
0.03 max |
0.04 |
0.15–0.40 |
— |
— |
— |
Additional
requirement: Grades 100Q and 100QT shall have a Boron
(B) composition of 0.0005–0.005%.
G40.21 Mechanical Requirements for Plates, Bars, and
Shapes
|
Grade |
Tensile Strength,
ksi |
Yield
Strength, ksi, min. |
Yield
Strength, ksi, min. above 2-1/2" to 4" |
Elongation, %
min. in 8" |
|
38W |
60–85 |
38 |
36 |
20 |
|
44W |
65–90 |
44 |
40 |
20 |
|
50W |
65–95 |
50 |
46 |
19 |
|
55W |
70–95 |
55 |
— |
18 |
|
60W |
75–100 |
60 |
— |
16 |
|
70W |
85–115 |
70 |
— |
15 |
|
80W |
90–125 |
80 |
— |
13 |
|
38WT |
60–85 |
38 |
36 |
20 |
|
44WT |
65–90 |
44 |
40 |
20 |
|
50WT |
70–95 |
50 |
46 |
19 |
|
60WT |
75–100 |
60 |
— |
18 |
|
70WT |
85–115 |
70 |
— |
15 |
|
80WT |
90–125 |
80 |
— |
13 |
|
50R |
70–95 |
50 |
— |
19 |
|
50A |
70–95 |
50 |
50 |
19 |
|
60A |
75–100 |
60 |
— |
18 |
|
70A |
85–115 |
70 |
— |
15 |
|
80A |
90–125 |
80 |
— |
13 |
|
50AT |
70–95 |
50 |
50 |
19 |
|
60AT |
75–100 |
60 |
— |
18 |
|
70AT |
85–115 |
70 |
— |
15 |
|
80AT |
90–125 |
80 |
— |
13 |
|
100Q |
110–130 |
100 |
90 |
18 in 2" |
|
100QT |
110–130 |
100 |
90 |
18 in 2" |
Note: “—” indicates that no value is specified in the provided table.
Key Features of CSA G40.21 Structural Steel
• High structural strength
• Excellent weldability
• Good toughness
• Reliable dimensional accuracy
• Excellent formability
• Good machinability
• Superior load-bearing capability
• Suitable for heavy structural applications
• Long service life
• Available in multiple strength grades
Applications of CSA G40.21 Structural Steel
Construction Industry
• Building Structures
• Structural Frames
• Columns and Beams
• Floor Systems
• Industrial Buildings
Bridge & Infrastructure
• Bridge Structures
• Highway Infrastructure
• Railway Structures
• Structural Supports
• Infrastructure Components
Heavy Engineering
• Heavy Machinery
• Equipment Frames
• Industrial Structures
• Fabrication Components
• Load-Bearing Structures
Energy Industry
• Power Plant Structures
• Energy Equipment
• Support Structures
• Industrial Platforms
• Utility Infrastructure
Transportation Industry
• Railway Components
• Transportation Structures
• Heavy Vehicle Components
• Trailer Structures
• Industrial Transport Equipment
Fabrication and Welding
CSA G40.21 structural steels
provide good fabrication and welding characteristics.
• Suitable for conventional
welding processes
• Good cutting characteristics
• Excellent bending properties
• Suitable for drilling and machining
• Good formability
• Reliable welded joint performance
• Suitable for structural fabrication
Proper welding procedures
should be followed according to the selected grade and material thickness.
Heat Treatment
Heat treatment requirements
vary according to the selected CSA G40.21 grade and product form.
• Normalizing can improve
uniformity and toughness
• Controlled rolling enhances mechanical performance
• Quenching and tempering can provide higher strength
• Stress relieving reduces residual fabrication stresses
• Controlled processing provides consistent mechanical properties
Advantages of CSA G40.21 Structural Steel
• High strength
• Excellent weldability
• Good toughness
• Reliable structural performance
• Excellent fabrication characteristics
• Wide range of strength grades
• Good dimensional stability
• Long operational life
• Suitable for demanding structural applications
• Cost-effective solution for construction and engineering
Conclusion
CSA G40.21 Structural Quality
Steel Plates, Sheets, Floor Plates & Bars are high-quality structural steel
products designed for construction, infrastructure, bridges, heavy engineering,
energy, transportation, and industrial applications. Available in 38W, 44W, 50W, 55W, 60W,
70W, 80W, 38WT, 44WT, 50WT, 60WT, 70WT, 80WT, 50R, 50A, 60A, 70A, 80A, 50AT,
60AT, 70AT, 80AT, 100Q, and 100QT grades, these products
provide reliable strength, toughness, weldability, and structural performance.
Ladhani Metal Corporation
supplies CSA G40.21 Structural Quality Steel Plates, Sheets, Floor Plates &
Bars in various grades, thicknesses, sizes, surface finishes, and customized
dimensions, providing reliable structural steel solutions for construction,
infrastructure, fabrication, and industrial engineering projects worldwide.
FOR REQUIREMENT OF THIS GRADE
OR FOR DETAIL CONTACT US AT :-
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