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

Close Alternative — 79.7% match based on chemical composition and mechanical property overlap.

CSA G40.21 300W (CSA G40.21-13 (R2023)) and AS/NZS 3678 Grade 300 (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 300 is commonly used for general fabrication, structural members, high-rise buildings, bridges, storage tanks. CSA G40.21 300W is defined under Canadian Standards Association (CSA), originating from Canada, while AS/NZS 3678 Grade 300 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 300 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%.

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 E250A ASTM A572 Gr.65 IS 2062 E250B0
Match Breakdown
CHEMISTRY MATCH
93.2%
MECHANICAL MATCH
52.6%
OVERALL
79.7%
Specifications
Property CSA G40.21 300W AS/NZS 3678 Grade 300
Standard CSA G40.21-13 (R2023) AS/NZS 3678:2016
Category Structural Steel Structural Steel
C (%) <=0.23 <=0.22
Mn (%) <=1.50 <=1.70
P (%) <=0.040 <=0.040
S (%) <=0.050 <=0.040
Si (%) Not specified <=0.50
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 300
Tensile Strength 450-620 MPa 430-560 MPa
Yield Strength 300 MPa min 300 MPa min
Elongation 20-23 % 22% min
Typical Applications
CSA G40.21 300W
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures
AS/NZS 3678 Grade 300
General fabrication, structural members, high-rise buildings, bridges, storage tanks
Key Differences
Can CSA G40.21 300W Be Substituted With AS/NZS 3678 Grade 300?
CSA G40.21 300W and AS/NZS 3678 Grade 300 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.
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 300
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–3100 mm (98.43–122.05 in)
On M-EX Right Now
CSA G40.21 300W
2 active listings and RFQs →
AS/NZS 3678 Grade 300
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 300W and AS/NZS 3678 Grade 300?
AS/NZS 3678 Grade 300 specifies Si which is not specified for CSA G40.21 300W.
Can CSA G40.21 300W be substituted with AS/NZS 3678 Grade 300?
CSA G40.21 300W and AS/NZS 3678 Grade 300 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.