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ASTM A588 vs CSA G40.21 260WT

Related Material — 59.3% match based on chemical composition and mechanical property overlap.

ASTM A588 (ASTM A588) and CSA G40.21 260WT (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 260WT is commonly used for weldable structural steel with guaranteed charpy v-notch low-temperature toughness; secondary members, stair stringers, bracing in cold-climate service. ASTM A588 is defined under ASTM International, originating from United States, while CSA G40.21 260WT is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, ASTM A588 vs CSA G40.21 260WT is a 88.9% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 59.3%.

Frequently Compared With ASTM A588:
EN 10025-5 S355J2W CSA G40.21 350A ASTM A588 Grade A AS/NZS 3678 Grade 350WR EN 10025-5 S355J0WP JIS G3114 SMA400 EN 10025-5 S355J2WP CSA G40.21 50W ASTM A588 Grade B ASTM A709 Grade HPS 70W CSA G40.21 480A EN 10025-5 S235J2W
Match Breakdown
CHEMISTRY MATCH
88.9%
MECHANICAL MATCH
0%
OVERALL
59.3%
Specifications
Property ASTM A588 CSA G40.21 260WT
Standard ASTM A588 CSA G40.21-13 (R2023)
Category Structural Steel (Corten / Weathering) Structural Steel (Corten / Weathering)
C (%) 0.19 max <=0.20
Mn (%) 0.80-1.25 <=1.35
Si (%) 0.30-0.65 <=0.40
Cu (%) 0.20-0.40 0.20-0.40
Cr (%) 0.40-0.70 0.40-0.65
Ni (%) 0.40 max <=0.40
P (%) 0.04 max <=0.035
S (%) 0.05 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 260WT
Tensile Strength 485-630 MPa 380-480 MPa
Yield Strength 345 MPa min 260 MPa min
Elongation 18-21% 23% min
Hardness 140-190 HB Not specified
Impact Not specified 27J at -20°C
Typical Applications
ASTM A588
Used for bridges, railway wagons, transmission poles, architectural structures, containers, and outdoor construction.
CSA G40.21 260WT
Weldable structural steel with guaranteed Charpy V-notch low-temperature toughness; secondary members, stair stringers, bracing in cold-climate service
Can ASTM A588 Be Substituted With CSA G40.21 260WT?
ASTM A588 and CSA G40.21 260WT 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
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 260WT
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2600–2900 mm (102.36–114.17 in)
On M-EX Right Now
ASTM A588
2 active listings and RFQs →
CSA G40.21 260WT
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A588 and CSA G40.21 260WT?
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 260WT?
ASTM A588 and CSA G40.21 260WT 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.