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

Strong Match — 87.3% match based on chemical composition and mechanical property overlap.

CSA G40.21 350A (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 350A is typically used for exposed structural steelwork, bridges, retaining walls, coastal infrastructure, architectural facades., 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 350A 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 350A vs AS/NZS 3678 Grade 350WR is a 85.3% match. As per mechanical properties, the match is 91.2%. Combined, this makes them a strong match overall at 87.3%.

Frequently Compared With CSA G40.21 350A:
ASTM A588 EN 10025-5 S355J2WP CSA G40.21 50W CSA G40.21 260WT ASTM A588 Grade A EN 10025-5 S355J0WP EN 10025-5 S355J2W JIS G3114 SMA400 ASTM A709 Grade HPS 70W CSA G40.21 480A EN 10025-5 S235J2W ASTM A588 Grade B
Match Breakdown
CHEMISTRY MATCH
85.3%
MECHANICAL MATCH
91.2%
OVERALL
87.3%
Specifications
Property CSA G40.21 350A 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 (%) max 0.19 <=0.20
Mn (%) max 1.35 <=1.70
Si (%) max 0.65 <=0.50
P (%) max 0.035 <=0.035
S (%) max 0.035 <=0.035
Cu (%) 0.25-0.4 0.25-0.55
Cr (%) 0.4-0.65 0.40-0.80
Ni (%) 0.4-0.7 <=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 350A AS/NZS 3678 Grade 350WR
Yield Strength 350 MPa min 350 MPa min
Tensile Strength 480-650 MPa 480-620 MPa
Elongation Not specified 20% min
Typical Applications
CSA G40.21 350A
Exposed structural steelwork, bridges, retaining walls, coastal infrastructure, architectural facades.
AS/NZS 3678 Grade 350WR
Weather-resistant (corrosion-resistant) structural steel; exposed bridge and structural applications requiring atmospheric corrosion resistance
Can CSA G40.21 350A Be Substituted With AS/NZS 3678 Grade 350WR?
CSA G40.21 350A and AS/NZS 3678 Grade 350WR overlap closely enough on chemistry and mechanical properties that AS/NZS 3678 Grade 350WR is often considered as a substitute for CSA G40.21 350A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
CSA G40.21 350A
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3300–3400 mm (129.92–133.86 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 350A
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 350A 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 350A be substituted with AS/NZS 3678 Grade 350WR?
CSA G40.21 350A and AS/NZS 3678 Grade 350WR overlap closely enough on chemistry and mechanical properties that AS/NZS 3678 Grade 350WR is often considered as a substitute for CSA G40.21 350A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.