Close Alternative — 79.1% match
based on chemical composition and mechanical property overlap.
AS/NZS 3678 Grade 400 (AS/NZS 3678:2016) and CSA G40.21 400A (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 400A is commonly used for atmospheric corrosion-resistant (weathering) structural steel; exposed bridge girders and structural members where high strength and weathering resistance are both needed.
AS/NZS 3678 Grade 400 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand, while CSA G40.21 400A is defined under Canadian Standards Association (CSA), originating from Canada.
As per chemical composition, AS/NZS 3678 Grade 400 vs CSA G40.21 400A is a 93.7% match.
As per mechanical properties, the match is 50%.
Combined, this makes them a close alternative overall at 79.1%.
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 400A
Yield Strength
400 MPa min (t<=12mm)
400 MPa min
Tensile Strength
~520 MPa min (approx, equivalent to ASTM A572 Gr.60)
Atmospheric corrosion-resistant (weathering) structural steel; exposed bridge girders and structural members where high strength and weathering resistance are both needed
Key Differences
CSA G40.21 400A specifies Cu which is not specified for AS/NZS 3678 Grade 400.
Can AS/NZS 3678 Grade 400 Be Substituted With CSA G40.21 400A?
AS/NZS 3678 Grade 400 and CSA G40.21 400A 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 400A?
CSA G40.21 400A specifies Cu which is not specified for AS/NZS 3678 Grade 400.
Can AS/NZS 3678 Grade 400 be substituted with CSA G40.21 400A?
AS/NZS 3678 Grade 400 and CSA G40.21 400A 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.