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ASTM A572 Gr.65 vs CSA G40.21 300W

Related Material — 65.9% match based on chemical composition and mechanical property overlap.

ASTM A572 Gr.65 (ASTM A572) and CSA G40.21 300W (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 300W is commonly used for structural fabrication,bridges,buildings,machinery frames,general construction,welded structures. ASTM A572 Gr.65 is defined under ASTM International, originating from United States, while CSA G40.21 300W is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, ASTM A572 Gr.65 vs CSA G40.21 300W is a 90.6% match. As per mechanical properties, the match is 16.4%. Combined, this makes them a related material overall at 65.9%.

Frequently Compared With ASTM A572 Gr.65:
ASTM A572 Grade 50 ASTM A283C CSA G40.21 260W CSA G40.21 350W CSA G40.21 400W GOST 19281 09G2S AS/NZS 3679.1 300 CSA G40.21 480W AS/NZS 3679.1 350 AS/NZS 1595 C450 ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80
Match Breakdown
CHEMISTRY MATCH
90.6%
MECHANICAL MATCH
16.4%
OVERALL
65.9%
Specifications
Property ASTM A572 Gr.65 CSA G40.21 300W
Standard ASTM A572 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) 0.23 max <=0.23
Mn (%) 1.35 max <=1.50
Si (%) 0.40 max Not specified
V (%) 0.15 max Not specified
Nb (%) 0.05 max Not specified
P (%) 0.040 max <=0.040
S (%) 0.050 max <=0.050
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 300W
Tensile Strength 550-690 MPa 450-620 MPa
Yield Strength 450 MPa min 300 MPa min
Elongation 18-21% 20-23 %
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 300W
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures
Key Differences
Can ASTM A572 Gr.65 Be Substituted With CSA G40.21 300W?
ASTM A572 Gr.65 and CSA G40.21 300W 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
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 300W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2700–2800 mm (106.3–110.24 in)
On M-EX Right Now
ASTM A572 Gr.65
4 active listings and RFQs →
CSA G40.21 300W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A572 Gr.65 and CSA G40.21 300W?
ASTM A572 Gr.65 specifies Si, V, Nb which are not specified for CSA G40.21 300W.
Can ASTM A572 Gr.65 be substituted with CSA G40.21 300W?
ASTM A572 Gr.65 and CSA G40.21 300W 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.