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ASTM A588 Grade A vs CSA G40.21 50W

Related Material — 67.6% match based on chemical composition and mechanical property overlap.

ASTM A588 Grade A (ASTM A588) and CSA G40.21 50W (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel (Corten / Weathering) category. ASTM A588 Grade A is typically used for high-strength low-alloy structural steel with atmospheric corrosion resistance (weathering steel); bridges, transmission/communication towers, gusset plates, exposed structural applications, while CSA G40.21 50W is commonly used for bridges, architectural structures, transmission towers, outdoor exposed structures, railway wagons.. ASTM A588 Grade A is defined under ASTM International, originating from United States, while CSA G40.21 50W is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, ASTM A588 Grade A vs CSA G40.21 50W is a 84.7% match. As per mechanical properties, the match is 33.3%. Combined, this makes them a related material overall at 67.6%.

Frequently Compared With ASTM A588 Grade A:
ASTM A588 JIS G3114 SMA400 CSA G40.21 260WT CSA G40.21 350A EN 10025-5 S355J2W EN 10025-5 S355J2WP AS/NZS 3678 Grade 350WR EN 10025-5 S355J0WP CSA G40.21 480A ASTM A709 Grade HPS 70W EN 10025-5 S235J2W ASTM A588 Grade B
Match Breakdown
CHEMISTRY MATCH
84.7%
MECHANICAL MATCH
33.3%
OVERALL
67.6%
Specifications
Property ASTM A588 Grade A CSA G40.21 50W
Standard ASTM A588 CSA G40.21-13 (R2023)
Category Structural Steel (Corten / Weathering) Structural Steel (Corten / Weathering)
C (%) <=0.19 max 0.19
Mn (%) 0.80-1.25 max 1.35
Si (%) 0.30-0.65 max 0.65
P (%) <=0.040 max 0.035
S (%) <=0.050 max 0.035
Cu (%) 0.25-0.40 0.25-0.4
Cr (%) 0.40-0.65 0.4-0.65
Ni (%) <=0.40 0.4-0.7
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A588 Grade A CSA G40.21 50W
Tensile Strength 485 MPa min 450-655 MPa (65-95 ksi)
Yield Strength 345 MPa min 345 MPa (50 ksi) min
Elongation 18% min 19% min
Hardness 140-190 HB Not specified
Typical Applications
ASTM A588 Grade A
High-strength low-alloy structural steel with atmospheric corrosion resistance (weathering steel); bridges, transmission/communication towers, gusset plates, exposed structural applications
CSA G40.21 50W
Bridges, architectural structures, transmission towers, outdoor exposed structures, railway wagons.
Can ASTM A588 Grade A Be Substituted With CSA G40.21 50W?
ASTM A588 Grade A and CSA G40.21 50W 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 A588 Grade A
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)
CSA G40.21 50W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2700–4300 mm (106.3–169.29 in)
On M-EX Right Now
ASTM A588 Grade A
2 active listings and RFQs →
CSA G40.21 50W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A588 Grade A and CSA G40.21 50W?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A588 Grade A be substituted with CSA G40.21 50W?
ASTM A588 Grade A and CSA G40.21 50W 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.