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CSA G40.21 400A vs CSA G40.21 400W

Strong Match — 95.4% match based on chemical composition and mechanical property overlap.

CSA G40.21 400A (CSA G40.21-13 (R2023)) and CSA G40.21 400W (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel category. CSA G40.21 400A is typically used for atmospheric corrosion-resistant (weathering) structural steel; exposed bridge girders and structural members where high strength and weathering resistance are both needed, while CSA G40.21 400W is commonly used for heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.. CSA G40.21 400A is defined under Canadian Standards Association (CSA), originating from Canada, while CSA G40.21 400W is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, CSA G40.21 400A vs CSA G40.21 400W is a 96% match. As per mechanical properties, the match is 94.1%. Combined, this makes them a strong match overall at 95.4%.

Frequently Compared With CSA G40.21 400A:
CSA G40.21 480W CSA G40.21 350W ASTM A1008 SS Grade 50 AS/NZS 1595 C450 ASTM A1008 SS Grade 80 AS/NZS 1595 C350 CSA G40.21 260W CSA G40.21 300W IS 2062 E250A ASTM A572 Grade 50 IS 2062 E250B0 ASTM A283C
Match Breakdown
CHEMISTRY MATCH
96%
MECHANICAL MATCH
94.1%
OVERALL
95.4%
Specifications
Property CSA G40.21 400A CSA G40.21 400W
Standard CSA G40.21-13 (R2023) CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) <=0.23 max 0.23
Mn (%) <=1.60 max 1.6
Si (%) <=0.40 max 0.5
P (%) <=0.035 max 0.035
S (%) <=0.035 max 0.035
Cu (%) 0.20-0.40 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property CSA G40.21 400A CSA G40.21 400W
Tensile Strength 520-670 MPa 520-690 MPa
Yield Strength 400 MPa min 400 MPa min
Elongation 17% min Not specified
Impact 27J at 0°C Not specified
Typical Applications
CSA G40.21 400A
Atmospheric corrosion-resistant (weathering) structural steel; exposed bridge girders and structural members where high strength and weathering resistance are both needed
CSA G40.21 400W
Heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.
Key Differences
Can CSA G40.21 400A Be Substituted With CSA G40.21 400W?
CSA G40.21 400A and CSA G40.21 400W overlap closely enough on chemistry and mechanical properties that CSA G40.21 400W is often considered as a substitute for CSA G40.21 400A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
CSA G40.21 400A
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2800–4200 mm (110.24–165.35 in)
CSA G40.21 400W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–5200 mm (98.43–204.72 in)
On M-EX Right Now
CSA G40.21 400A
2 active listings and RFQs →
CSA G40.21 400W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 400A and CSA G40.21 400W?
CSA G40.21 400A specifies Cu which is not specified for CSA G40.21 400W.
Can CSA G40.21 400A be substituted with CSA G40.21 400W?
CSA G40.21 400A and CSA G40.21 400W overlap closely enough on chemistry and mechanical properties that CSA G40.21 400W is often considered as a substitute for CSA G40.21 400A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.