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CSA G40.21 400W vs ASTM A572 Gr.65

Close Alternative — 75.7% match based on chemical composition and mechanical property overlap.

CSA G40.21 400W (CSA G40.21-13 (R2023)) and ASTM A572 Gr.65 (ASTM A572) 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 ASTM A572 Gr.65 is commonly used for used for bridges, buildings, transmission towers, construction equipment, offshore structures, and structural members.. CSA G40.21 400W is defined under Canadian Standards Association (CSA), originating from Canada, while ASTM A572 Gr.65 is defined under ASTM International, originating from United States.

As per chemical composition, CSA G40.21 400W vs ASTM A572 Gr.65 is a 92.9% match. As per mechanical properties, the match is 41.2%. Combined, this makes them a close alternative overall at 75.7%.

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 CSA G40.21 400A
Match Breakdown
CHEMISTRY MATCH
92.9%
MECHANICAL MATCH
41.2%
OVERALL
75.7%
Specifications
Property CSA G40.21 400W ASTM A572 Gr.65
Standard CSA G40.21-13 (R2023) ASTM A572
Category Structural Steel Structural Steel
C (%) max 0.23 0.23 max
Mn (%) max 1.6 1.35 max
Si (%) max 0.5 0.40 max
P (%) max 0.035 0.040 max
S (%) max 0.035 0.050 max
V (%) Not specified 0.15 max
Nb (%) Not specified 0.05 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 ASTM A572 Gr.65
Yield Strength 400 MPa min 450 MPa min
Tensile Strength 520-690 MPa 550-690 MPa
Elongation Not specified 18-21%
Hardness Not specified 170-220 HB
Typical Applications
CSA G40.21 400W
Heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.
ASTM A572 Gr.65
Used for bridges, buildings, transmission towers, construction equipment, offshore structures, and structural members.
Key Differences
Can CSA G40.21 400W Be Substituted With ASTM A572 Gr.65?
CSA G40.21 400W and ASTM A572 Gr.65 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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)
ASTM A572 Gr.65
Plate → (4 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2600–4400 mm (102.36–173.23 in)
On M-EX Right Now
CSA G40.21 400W
2 active listings and RFQs →
ASTM A572 Gr.65
4 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 400W and ASTM A572 Gr.65?
ASTM A572 Gr.65 specifies V, Nb which are not specified for CSA G40.21 400W.
Can CSA G40.21 400W be substituted with ASTM A572 Gr.65?
CSA G40.21 400W and ASTM A572 Gr.65 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.