Close Alternative — 79.7% match
based on chemical composition and mechanical property overlap.
AS/NZS 3678 Grade 300 (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 300 is typically used for general fabrication, structural members, high-rise buildings, bridges, storage tanks, while CSA G40.21 300W is commonly used for structural fabrication,bridges,buildings,machinery frames,general construction,welded structures.
AS/NZS 3678 Grade 300 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 300 vs CSA G40.21 300W is a 93.2% match.
As per mechanical properties, the match is 52.6%.
Combined, this makes them a close alternative overall at 79.7%.
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 300
CSA G40.21 300W
Tensile Strength
430-560 MPa
450-620 MPa
Yield Strength
300 MPa min
300 MPa min
Elongation
22% min
20-23 %
Typical Applications
AS/NZS 3678 Grade 300
General fabrication, structural members, high-rise buildings, bridges, storage tanks
AS/NZS 3678 Grade 300 specifies Si which is not specified for CSA G40.21 300W.
Can AS/NZS 3678 Grade 300 Be Substituted With CSA G40.21 300W?
AS/NZS 3678 Grade 300 and CSA G40.21 300W 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 300 and CSA G40.21 300W?
AS/NZS 3678 Grade 300 specifies Si which is not specified for CSA G40.21 300W.
Can AS/NZS 3678 Grade 300 be substituted with CSA G40.21 300W?
AS/NZS 3678 Grade 300 and CSA G40.21 300W 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.