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CSA G40.21 480A vs ASTM A588

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

CSA G40.21 480A (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 480A is typically used for high-strength atmospheric corrosion-resistant (weathering) structural steel; heavy exposed structural members, bridge girders, while ASTM A588 is commonly used for used for bridges, railway wagons, transmission poles, architectural structures, containers, and outdoor construction.. CSA G40.21 480A 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 480A vs ASTM A588 is a 80.7% match. As per mechanical properties, the match is 1.2%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With CSA G40.21 480A:
EN 10025-5 S355J2W CSA G40.21 350A ASTM A588 Grade A EN 10025-5 S355J0WP CSA G40.21 50W EN 10025-5 S355J2WP JIS G3114 SMA400 AS/NZS 3678 Grade 350WR ASTM A588 Grade B CSA G40.21 260WT ASTM A709 Grade HPS 70W EN 10025-5 S235J2W
Match Breakdown
CHEMISTRY MATCH
80.7%
MECHANICAL MATCH
1.2%
OVERALL
35%
Specifications
Property CSA G40.21 480A ASTM A588
Standard CSA G40.21-13 (R2023) ASTM A588
Category Structural Steel (Corten / Weathering) Structural Steel (Corten / Weathering)
C (%) <=0.23 0.19 max
Mn (%) <=1.60 0.80-1.25
Si (%) <=0.40 0.30-0.65
P (%) <=0.035 0.04 max
S (%) <=0.035 0.05 max
Cu (%) 0.20-0.40 0.20-0.40
Cr (%) 0.40-0.65 0.40-0.70
Ni (%) Not specified 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 480A ASTM A588
Tensile Strength 620-760 MPa 485-630 MPa
Yield Strength 480 MPa min 345 MPa min
Elongation 15% min 18-21%
Impact 27J at 0°C Not specified
Hardness Not specified 140-190 HB
Typical Applications
CSA G40.21 480A
High-strength atmospheric corrosion-resistant (weathering) structural steel; heavy exposed structural members, bridge girders
ASTM A588
Used for bridges, railway wagons, transmission poles, architectural structures, containers, and outdoor construction.
Key Differences
Can CSA G40.21 480A Be Substituted With ASTM A588?
CSA G40.21 480A 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 480A
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–3400 mm (98.43–133.86 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 480A
2 active listings and RFQs →
ASTM A588
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 480A and ASTM A588?
ASTM A588 specifies Ni which is not specified for CSA G40.21 480A.
Can CSA G40.21 480A be substituted with ASTM A588?
CSA G40.21 480A 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.