Post Stock Login Register

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

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

AS/NZS 3678 Grade 450 (AS/NZS 3678:2016) and CSA G40.21 300W (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel category. AS/NZS 3678 Grade 450 is typically used for heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment., while CSA G40.21 300W is commonly used for structural fabrication,bridges,buildings,machinery frames,general construction,welded structures. AS/NZS 3678 Grade 450 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand, while CSA G40.21 300W is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, AS/NZS 3678 Grade 450 vs CSA G40.21 300W 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 AS/NZS 3678 Grade 450:
IS 2062 E250A AS/NZS 3679.1 350 AS/NZS 1595 C350 IS 2062 E250B0 CSA G40.21 350W ASTM A1008 SS Grade 80 CSA G40.21 400A AS/NZS 3679.1 300 ASTM A283C ASTM A1008 SS Grade 50 ASTM A572 Gr.65 AS/NZS 1595 C450
Match Breakdown
CHEMISTRY MATCH
91.5%
MECHANICAL MATCH
No shared data
OVERALL
91.5%
Specifications
Property AS/NZS 3678 Grade 450 CSA G40.21 300W
Standard AS/NZS 3678:2016 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) max 0.2 <=0.23
Mn (%) max 1.6 <=1.50
Si (%) max 0.55 Not specified
P (%) max 0.03 <=0.040
S (%) max 0.03 <=0.050
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property AS/NZS 3678 Grade 450 CSA G40.21 300W
Tensile Strength Not specified 450-620 MPa
Yield Strength Not specified 300 MPa min
Elongation Not specified 20-23 %
Typical Applications
AS/NZS 3678 Grade 450
Heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.
CSA G40.21 300W
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures
Key Differences
Can AS/NZS 3678 Grade 450 Be Substituted With CSA G40.21 300W?
AS/NZS 3678 Grade 450 and CSA G40.21 300W overlap closely enough on chemistry and mechanical properties that CSA G40.21 300W is often considered as a substitute for AS/NZS 3678 Grade 450 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
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)
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)
On M-EX Right Now
AS/NZS 3678 Grade 450
2 active listings and RFQs →
CSA G40.21 300W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3678 Grade 450 and CSA G40.21 300W?
AS/NZS 3678 Grade 450 specifies Si which is not specified for CSA G40.21 300W.
Can AS/NZS 3678 Grade 450 be substituted with CSA G40.21 300W?
AS/NZS 3678 Grade 450 and CSA G40.21 300W overlap closely enough on chemistry and mechanical properties that CSA G40.21 300W is often considered as a substitute for AS/NZS 3678 Grade 450 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.