Close Alternative — 81.7% match
based on chemical composition and mechanical property overlap.
AS/NZS 3678 Grade 400 (AS/NZS 3678:2016) and CSA G40.21 400W (CSA G40.21-13 (R2023)) are both steel grades.
Both fall under the Structural Steel category.
AS/NZS 3678 Grade 400 is typically used for heavy structural fabrication, crane booms, mining machinery, earthmoving equipment, structural columns., while CSA G40.21 400W is commonly used for heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment..
AS/NZS 3678 Grade 400 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand, while CSA G40.21 400W is defined under Canadian Standards Association (CSA), originating from Canada.
As per chemical composition, AS/NZS 3678 Grade 400 vs CSA G40.21 400W is a 97.5% match.
As per mechanical properties, the match is 50%.
Combined, this makes them a close alternative overall at 81.7%.
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 400
CSA G40.21 400W
Yield Strength
400 MPa min (t<=12mm)
400 MPa min
Tensile Strength
~520 MPa min (approx, equivalent to ASTM A572 Gr.60)
Can AS/NZS 3678 Grade 400 Be Substituted With CSA G40.21 400W?
AS/NZS 3678 Grade 400 and CSA G40.21 400W are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
What is the difference between AS/NZS 3678 Grade 400 and CSA G40.21 400W?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can AS/NZS 3678 Grade 400 be substituted with CSA G40.21 400W?
AS/NZS 3678 Grade 400 and CSA G40.21 400W are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.