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CSA G40.21 260W vs AS/NZS 3678 Grade 450

Strong Match — 95.8% match based on chemical composition and mechanical property overlap.

CSA G40.21 260W (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 260W is typically used for bridges, buildings, general structural fabrication, storage tanks, older infrastructure projects., 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 260W 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 260W vs AS/NZS 3678 Grade 450 is a 95.8% 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 95.8%.

Frequently Compared With CSA G40.21 260W:
IS 2062 E250B0 AS/NZS 1595 C450 IS 2062 E250A CSA G40.21 350W ASTM A283C ASTM A1008 SS Grade 80 GOST 19281 09G2S CSA G40.21 400A AS/NZS 1595 C350 CSA G40.21 300W ASTM A572 Grade 50 ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
95.8%
MECHANICAL MATCH
No shared data
OVERALL
95.8%
Specifications
Property CSA G40.21 260W AS/NZS 3678 Grade 450
Standard CSA G40.21-13 (R2023) AS/NZS 3678:2016
Category Structural Steel Structural Steel
C (%) max 0.23 max 0.2
Mn (%) max 1.4 max 1.6
Si (%) max 0.4 max 0.55
P (%) max 0.035 max 0.03
S (%) max 0.035 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 260W AS/NZS 3678 Grade 450
Yield Strength 260 MPa min Not specified
Tensile Strength 410-590 MPa Not specified
Typical Applications
CSA G40.21 260W
Bridges, buildings, general structural fabrication, storage tanks, older infrastructure projects.
AS/NZS 3678 Grade 450
Heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.
Can CSA G40.21 260W Be Substituted With AS/NZS 3678 Grade 450?
CSA G40.21 260W 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 260W 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 260W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3400–4000 mm (133.86–157.48 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 260W
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 260W 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 260W be substituted with AS/NZS 3678 Grade 450?
CSA G40.21 260W 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 260W in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.