Post Stock Login Register

ASTM A588 vs CSA G40.21 50W

Close Alternative — 73.3% match based on chemical composition and mechanical property overlap.

ASTM A588 (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 is typically used for used for bridges, railway wagons, transmission poles, architectural structures, containers, and outdoor construction., while CSA G40.21 50W is commonly used for bridges, architectural structures, transmission towers, outdoor exposed structures, railway wagons.. ASTM A588 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 vs CSA G40.21 50W is a 81.4% match. As per mechanical properties, the match is 56.9%. Combined, this makes them a close alternative overall at 73.3%.

Frequently Compared With ASTM A588:
EN 10025-5 S355J2W CSA G40.21 350A ASTM A588 Grade A AS/NZS 3678 Grade 350WR JIS G3114 SMA400 EN 10025-5 S355J0WP CSA G40.21 260WT EN 10025-5 S355J2WP ASTM A709 Grade HPS 70W ASTM A588 Grade B CSA G40.21 480A EN 10025-5 S235J2W
Match Breakdown
CHEMISTRY MATCH
81.4%
MECHANICAL MATCH
56.9%
OVERALL
73.3%
Specifications
Property ASTM A588 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 max 0.19
Mn (%) 0.80-1.25 max 1.35
Si (%) 0.30-0.65 max 0.65
Cu (%) 0.20-0.40 0.25-0.4
Cr (%) 0.40-0.70 0.4-0.65
Ni (%) 0.40 max 0.4-0.7
P (%) 0.04 max max 0.035
S (%) 0.05 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 A588 CSA G40.21 50W
Tensile Strength 485-630 MPa 450-655 MPa (65-95 ksi)
Yield Strength 345 MPa min 345 MPa (50 ksi) min
Elongation 18-21% 19% min
Hardness 140-190 HB Not specified
Typical Applications
ASTM A588
Used for bridges, railway wagons, transmission poles, architectural structures, containers, and outdoor construction.
CSA G40.21 50W
Bridges, architectural structures, transmission towers, outdoor exposed structures, railway wagons.
Can ASTM A588 Be Substituted With CSA G40.21 50W?
ASTM A588 and CSA G40.21 50W 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 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)
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
2 active listings and RFQs →
CSA G40.21 50W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A588 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 be substituted with CSA G40.21 50W?
ASTM A588 and CSA G40.21 50W 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.