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

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

ASTM A572 Gr.65 (ASTM A572) and CSA G40.21 400W (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel category. ASTM A572 Gr.65 is typically used for used for bridges, buildings, transmission towers, construction equipment, offshore structures, and structural members., while CSA G40.21 400W is commonly used for heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.. ASTM A572 Gr.65 is defined under ASTM International, originating from United States, while CSA G40.21 400W is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, ASTM A572 Gr.65 vs CSA G40.21 400W 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 ASTM A572 Gr.65:
ASTM A572 Grade 50 ASTM A283C CSA G40.21 260W GOST 19281 09G2S CSA G40.21 300W CSA G40.21 350W AS/NZS 3679.1 300 AS/NZS 3679.1 350 CSA G40.21 480W AS/NZS 1595 C450 ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80
Match Breakdown
CHEMISTRY MATCH
92.9%
MECHANICAL MATCH
41.2%
OVERALL
75.7%
Specifications
Property ASTM A572 Gr.65 CSA G40.21 400W
Standard ASTM A572 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) 0.23 max max 0.23
Mn (%) 1.35 max max 1.6
Si (%) 0.40 max max 0.5
V (%) 0.15 max Not specified
Nb (%) 0.05 max Not specified
P (%) 0.040 max max 0.035
S (%) 0.050 max max 0.035
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A572 Gr.65 CSA G40.21 400W
Tensile Strength 550-690 MPa 520-690 MPa
Yield Strength 450 MPa min 400 MPa min
Elongation 18-21% Not specified
Hardness 170-220 HB Not specified
Typical Applications
ASTM A572 Gr.65
Used for bridges, buildings, transmission towers, construction equipment, offshore structures, and structural members.
CSA G40.21 400W
Heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.
Key Differences
Can ASTM A572 Gr.65 Be Substituted With CSA G40.21 400W?
ASTM A572 Gr.65 and CSA G40.21 400W 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
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)
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
ASTM A572 Gr.65
4 active listings and RFQs →
CSA G40.21 400W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A572 Gr.65 and CSA G40.21 400W?
ASTM A572 Gr.65 specifies V, Nb which are not specified for CSA G40.21 400W.
Can ASTM A572 Gr.65 be substituted with CSA G40.21 400W?
ASTM A572 Gr.65 and CSA G40.21 400W 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.