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CSA G40.21 300W vs AS/NZS 3678 Grade 450

Strong Match — 91.5% match based on chemical composition and mechanical property overlap.

CSA G40.21 300W (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 300W is typically used for structural fabrication,bridges,buildings,machinery frames,general construction,welded structures, 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 300W 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 300W vs AS/NZS 3678 Grade 450 is a 91.5% 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 91.5%.

Frequently Compared With CSA G40.21 300W:
CSA G40.21 400W AS/NZS 1595 C350 ASTM A1008 SS Grade 50 CSA G40.21 480W GOST 19281 09G2S CSA G40.21 400A AS/NZS 1595 C450 CSA G40.21 260W ASTM A572 Grade 50 IS 2062 E250B0 ASTM A572 Gr.65 IS 2062 E250A
Match Breakdown
CHEMISTRY MATCH
91.5%
MECHANICAL MATCH
No shared data
OVERALL
91.5%
Specifications
Property CSA G40.21 300W AS/NZS 3678 Grade 450
Standard CSA G40.21-13 (R2023) AS/NZS 3678:2016
Category Structural Steel Structural Steel
C (%) <=0.23 max 0.2
Mn (%) <=1.50 max 1.6
P (%) <=0.040 max 0.03
S (%) <=0.050 max 0.03
Si (%) Not specified max 0.55
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 300W AS/NZS 3678 Grade 450
Tensile Strength 450-620 MPa Not specified
Yield Strength 300 MPa min Not specified
Elongation 20-23 % Not specified
Typical Applications
CSA G40.21 300W
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures
AS/NZS 3678 Grade 450
Heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.
Key Differences
Can CSA G40.21 300W Be Substituted With AS/NZS 3678 Grade 450?
CSA G40.21 300W 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 300W 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 300W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2700–2800 mm (106.3–110.24 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 300W
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 300W and AS/NZS 3678 Grade 450?
AS/NZS 3678 Grade 450 specifies Si which is not specified for CSA G40.21 300W.
Can CSA G40.21 300W be substituted with AS/NZS 3678 Grade 450?
CSA G40.21 300W 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 300W in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.