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CSA G40.21 350A vs ASTM A588

Related Material — 68.5% match based on chemical composition and mechanical property overlap.

CSA G40.21 350A (CSA G40.21-13 (R2023)) and ASTM A588 (ASTM A588) are both steel grades. Both fall under the Structural Steel (Corten / Weathering) category. CSA G40.21 350A is typically used for exposed structural steelwork, bridges, retaining walls, coastal infrastructure, architectural facades., while ASTM A588 is commonly used for used for bridges, railway wagons, transmission poles, architectural structures, containers, and outdoor construction.. CSA G40.21 350A is defined under Canadian Standards Association (CSA), originating from Canada, while ASTM A588 is defined under ASTM International, originating from United States.

As per chemical composition, CSA G40.21 350A vs ASTM A588 is a 81.4% match. As per mechanical properties, the match is 42.6%. Combined, this makes them a related material overall at 68.5%.

Frequently Compared With CSA G40.21 350A:
AS/NZS 3678 Grade 350WR CSA G40.21 260WT EN 10025-5 S355J2WP CSA G40.21 50W JIS G3114 SMA400 ASTM A588 Grade A EN 10025-5 S355J0WP EN 10025-5 S355J2W ASTM A709 Grade HPS 70W CSA G40.21 480A EN 10025-5 S235J2W ASTM A588 Grade B
Match Breakdown
CHEMISTRY MATCH
81.4%
MECHANICAL MATCH
42.6%
OVERALL
68.5%
Specifications
Property CSA G40.21 350A ASTM A588
Standard CSA G40.21-13 (R2023) ASTM A588
Category Structural Steel (Corten / Weathering) Structural Steel (Corten / Weathering)
C (%) max 0.19 0.19 max
Mn (%) max 1.35 0.80-1.25
Si (%) max 0.65 0.30-0.65
P (%) max 0.035 0.04 max
S (%) max 0.035 0.05 max
Cu (%) 0.25-0.4 0.20-0.40
Cr (%) 0.4-0.65 0.40-0.70
Ni (%) 0.4-0.7 0.40 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 350A ASTM A588
Yield Strength 350 MPa min 345 MPa min
Tensile Strength 480-650 MPa 485-630 MPa
Elongation Not specified 18-21%
Hardness Not specified 140-190 HB
Typical Applications
CSA G40.21 350A
Exposed structural steelwork, bridges, retaining walls, coastal infrastructure, architectural facades.
ASTM A588
Used for bridges, railway wagons, transmission poles, architectural structures, containers, and outdoor construction.
Can CSA G40.21 350A Be Substituted With ASTM A588?
CSA G40.21 350A and ASTM A588 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 350A
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3300–3400 mm (129.92–133.86 in)
ASTM A588
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–2700 mm (98.43–106.3 in)
On M-EX Right Now
CSA G40.21 350A
2 active listings and RFQs →
ASTM A588
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 350A and ASTM A588?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can CSA G40.21 350A be substituted with ASTM A588?
CSA G40.21 350A and ASTM A588 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.