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

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

CSA G40.21 400W (CSA G40.21-13 (R2023)) and CSA G40.21 400A (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel category. CSA G40.21 400W is typically used for heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment., while CSA G40.21 400A is commonly used for 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 is defined under Canadian Standards Association (CSA), originating from Canada, while CSA G40.21 400A is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, CSA G40.21 400W vs CSA G40.21 400A 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 400W:
AS/NZS 1595 C450 CSA G40.21 300W AS/NZS 3679.1 300 AS/NZS 3679.1 350 ASTM A1008 SS Grade 80 IS 2062 E250A IS 2062 E250B0 GOST 19281 09G2S AS/NZS 1595 C350 ASTM A1008 SS Grade 50 CSA G40.21 350W ASTM A283C
Match Breakdown
CHEMISTRY MATCH
96%
MECHANICAL MATCH
94.1%
OVERALL
95.4%
Specifications
Property CSA G40.21 400W CSA G40.21 400A
Standard CSA G40.21-13 (R2023) CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) max 0.23 <=0.23
Mn (%) max 1.6 <=1.60
Si (%) max 0.5 <=0.40
P (%) max 0.035 <=0.035
S (%) max 0.035 <=0.035
Cu (%) Not specified 0.20-0.40
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 400W CSA G40.21 400A
Yield Strength 400 MPa min 400 MPa min
Tensile Strength 520-690 MPa 520-670 MPa
Elongation Not specified 17% min
Impact Not specified 27J at 0°C
Typical Applications
CSA G40.21 400W
Heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.
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
Key Differences
Can CSA G40.21 400W Be Substituted With CSA G40.21 400A?
CSA G40.21 400W and CSA G40.21 400A overlap closely enough on chemistry and mechanical properties that CSA G40.21 400A is often considered as a substitute for CSA G40.21 400W 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 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)
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)
On M-EX Right Now
CSA G40.21 400W
2 active listings and RFQs →
CSA G40.21 400A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 400W and CSA G40.21 400A?
CSA G40.21 400A specifies Cu which is not specified for CSA G40.21 400W.
Can CSA G40.21 400W be substituted with CSA G40.21 400A?
CSA G40.21 400W and CSA G40.21 400A overlap closely enough on chemistry and mechanical properties that CSA G40.21 400A is often considered as a substitute for CSA G40.21 400W in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.