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CSA G40.21 400W vs CSA G40.21 350W

Related Material — 69.5% match based on chemical composition and mechanical property overlap.

CSA G40.21 400W (CSA G40.21-13 (R2023)) and CSA G40.21 350W (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 350W is commonly used for used in buildings, bridges, cranes, transmission towers, heavy equipment, and structural fabrications.. CSA G40.21 400W is defined under Canadian Standards Association (CSA), originating from Canada, while CSA G40.21 350W is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, CSA G40.21 400W vs CSA G40.21 350W is a 93.8% match. As per mechanical properties, the match is 20.8%. Combined, this makes them a related material overall at 69.5%.

Frequently Compared With CSA G40.21 400W:
AS/NZS 1595 C450 AS/NZS 3679.1 300 CSA G40.21 300W 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 400A ASTM A283C
Match Breakdown
CHEMISTRY MATCH
93.8%
MECHANICAL MATCH
20.8%
OVERALL
69.5%
Specifications
Property CSA G40.21 400W CSA G40.21 350W
Standard CSA G40.21-13 (R2023) CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) max 0.23 0.23 max
Mn (%) max 1.6 0.50-1.50
Si (%) max 0.5 0.15-0.40
P (%) max 0.035 0.040 max
S (%) max 0.035 0.050 max
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 350W
Yield Strength 400 MPa min 350 MPa min
Tensile Strength 520-690 MPa 450-620 MPa
Elongation Not specified 20% min
Hardness Not specified 135-180 HB
Typical Applications
CSA G40.21 400W
Heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.
CSA G40.21 350W
Used in buildings, bridges, cranes, transmission towers, heavy equipment, and structural fabrications.
Can CSA G40.21 400W Be Substituted With CSA G40.21 350W?
CSA G40.21 400W and CSA G40.21 350W share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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 350W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2700–3400 mm (106.3–133.86 in)
On M-EX Right Now
CSA G40.21 400W
2 active listings and RFQs →
CSA G40.21 350W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 400W and CSA G40.21 350W?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can CSA G40.21 400W be substituted with CSA G40.21 350W?
CSA G40.21 400W and CSA G40.21 350W share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.