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CSA G40.21 350W vs AS/NZS 3678 Grade 450

Strong Match — 91.8% match based on chemical composition and mechanical property overlap.

CSA G40.21 350W (CSA G40.21-13 (R2023)) and AS/NZS 3678 Grade 450 (AS/NZS 3678:2016) are both steel grades. Both fall under the Structural Steel category. CSA G40.21 350W is typically used for used in buildings, bridges, cranes, transmission towers, heavy equipment, and structural fabrications., while AS/NZS 3678 Grade 450 is commonly used for heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.. CSA G40.21 350W is defined under Canadian Standards Association (CSA), originating from Canada, while AS/NZS 3678 Grade 450 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.

As per chemical composition, CSA G40.21 350W vs AS/NZS 3678 Grade 450 is a 91.8% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 91.8%.

Frequently Compared With CSA G40.21 350W:
AS/NZS 3679.1 350 IS 2062 E250B0 CSA G40.21 480W AS/NZS 1595 C350 AS/NZS 1595 C450 CSA G40.21 400A CSA G40.21 260W CSA G40.21 400W IS 2062 E250A GOST 19281 09G2S ASTM A572 Gr.65 ASTM A1008 SS Grade 80
Match Breakdown
CHEMISTRY MATCH
91.8%
MECHANICAL MATCH
No shared data
OVERALL
91.8%
Specifications
Property CSA G40.21 350W AS/NZS 3678 Grade 450
Standard CSA G40.21-13 (R2023) AS/NZS 3678:2016
Category Structural Steel Structural Steel
C (%) 0.23 max max 0.2
Mn (%) 0.50-1.50 max 1.6
Si (%) 0.15-0.40 max 0.55
P (%) 0.040 max max 0.03
S (%) 0.050 max max 0.03
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 350W AS/NZS 3678 Grade 450
Tensile Strength 450-620 MPa Not specified
Yield Strength 350 MPa min Not specified
Elongation 20% min Not specified
Hardness 135-180 HB Not specified
Typical Applications
CSA G40.21 350W
Used in buildings, bridges, cranes, transmission towers, heavy equipment, and structural fabrications.
AS/NZS 3678 Grade 450
Heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.
Can CSA G40.21 350W Be Substituted With AS/NZS 3678 Grade 450?
CSA G40.21 350W and AS/NZS 3678 Grade 450 overlap closely enough on chemistry and mechanical properties that AS/NZS 3678 Grade 450 is often considered as a substitute for CSA G40.21 350W 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 350W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2700–3400 mm (106.3–133.86 in)
AS/NZS 3678 Grade 450
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–4200 mm (98.43–165.35 in)
On M-EX Right Now
CSA G40.21 350W
2 active listings and RFQs →
AS/NZS 3678 Grade 450
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 350W and AS/NZS 3678 Grade 450?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can CSA G40.21 350W be substituted with AS/NZS 3678 Grade 450?
CSA G40.21 350W and AS/NZS 3678 Grade 450 overlap closely enough on chemistry and mechanical properties that AS/NZS 3678 Grade 450 is often considered as a substitute for CSA G40.21 350W in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.