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CSA G40.21 260WT vs AS/NZS 3678 Grade 350WR

Related Material — 58.2% match based on chemical composition and mechanical property overlap.

CSA G40.21 260WT (CSA G40.21-13 (R2023)) and AS/NZS 3678 Grade 350WR (AS/NZS 3678:2016) are both steel grades. Both fall under the Structural Steel (Corten / Weathering) category. CSA G40.21 260WT is typically used for weldable structural steel with guaranteed charpy v-notch low-temperature toughness; secondary members, stair stringers, bracing in cold-climate service, while AS/NZS 3678 Grade 350WR is commonly used for weather-resistant (corrosion-resistant) structural steel; exposed bridge and structural applications requiring atmospheric corrosion resistance. CSA G40.21 260WT is defined under Canadian Standards Association (CSA), originating from Canada, while AS/NZS 3678 Grade 350WR is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.

As per chemical composition, CSA G40.21 260WT vs AS/NZS 3678 Grade 350WR is a 87.4% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 58.2%.

Frequently Compared With CSA G40.21 260WT:
CSA G40.21 350A CSA G40.21 50W ASTM A588 Grade A ASTM A588 EN 10025-5 S355J2W JIS G3114 SMA400 EN 10025-5 S355J0WP EN 10025-5 S355J2WP ASTM A588 Grade B ASTM A709 Grade HPS 70W EN 10025-5 S235J2W CSA G40.21 480A
Match Breakdown
CHEMISTRY MATCH
87.4%
MECHANICAL MATCH
0%
OVERALL
58.2%
Specifications
Property CSA G40.21 260WT AS/NZS 3678 Grade 350WR
Standard CSA G40.21-13 (R2023) AS/NZS 3678:2016
Category Structural Steel (Corten / Weathering) Structural Steel (Corten / Weathering)
C (%) <=0.20 <=0.20
Mn (%) <=1.35 <=1.70
Si (%) <=0.40 <=0.50
P (%) <=0.035 <=0.035
S (%) <=0.035 <=0.035
Cu (%) 0.20-0.40 0.25-0.55
Cr (%) 0.40-0.65 0.40-0.80
Ni (%) <=0.40 <=0.65
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 260WT AS/NZS 3678 Grade 350WR
Tensile Strength 380-480 MPa 480-620 MPa
Yield Strength 260 MPa min 350 MPa min
Elongation 23% min 20% min
Impact 27J at -20°C Not specified
Typical Applications
CSA G40.21 260WT
Weldable structural steel with guaranteed Charpy V-notch low-temperature toughness; secondary members, stair stringers, bracing in cold-climate service
AS/NZS 3678 Grade 350WR
Weather-resistant (corrosion-resistant) structural steel; exposed bridge and structural applications requiring atmospheric corrosion resistance
Can CSA G40.21 260WT Be Substituted With AS/NZS 3678 Grade 350WR?
CSA G40.21 260WT and AS/NZS 3678 Grade 350WR 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 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)
AS/NZS 3678 Grade 350WR
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–2800 mm (98.43–110.24 in)
On M-EX Right Now
CSA G40.21 260WT
2 active listings and RFQs →
AS/NZS 3678 Grade 350WR
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 260WT and AS/NZS 3678 Grade 350WR?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can CSA G40.21 260WT be substituted with AS/NZS 3678 Grade 350WR?
CSA G40.21 260WT and AS/NZS 3678 Grade 350WR 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.