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AS/NZS 3678 Grade 300 vs CSA G40.21 400W

Related Material — 68.3% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 300 (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 300 is typically used for general fabrication, structural members, high-rise buildings, bridges, storage tanks, while CSA G40.21 400W is commonly used for heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.. AS/NZS 3678 Grade 300 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 300 vs CSA G40.21 400W is a 98.6% match. As per mechanical properties, the match is 7.7%. Combined, this makes them a related material overall at 68.3%.

Frequently Compared With AS/NZS 3678 Grade 300:
AS/NZS 3679.1 350 AS/NZS 3679.1 300 CSA G40.21 480W ASTM A1008 SS Grade 80 GOST 19281 09G2S CSA G40.21 260W CSA G40.21 300W ASTM A1008 SS Grade 50 CSA G40.21 400A CSA G40.21 350W ASTM A283C ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
98.6%
MECHANICAL MATCH
7.7%
OVERALL
68.3%
Specifications
Property AS/NZS 3678 Grade 300 CSA G40.21 400W
Standard AS/NZS 3678:2016 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) <=0.22 max 0.23
Mn (%) <=1.70 max 1.6
Si (%) <=0.50 max 0.5
P (%) <=0.040 max 0.035
S (%) <=0.040 max 0.035
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 400W
Tensile Strength 430-560 MPa 520-690 MPa
Yield Strength 300 MPa min 400 MPa min
Elongation 22% min Not specified
Typical Applications
AS/NZS 3678 Grade 300
General fabrication, structural members, high-rise buildings, bridges, storage tanks
CSA G40.21 400W
Heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.
Can AS/NZS 3678 Grade 300 Be Substituted With CSA G40.21 400W?
AS/NZS 3678 Grade 300 and CSA G40.21 400W share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
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)
CSA G40.21 400W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–5200 mm (98.43–204.72 in)
On M-EX Right Now
AS/NZS 3678 Grade 300
2 active listings and RFQs →
CSA G40.21 400W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3678 Grade 300 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 300 be substituted with CSA G40.21 400W?
AS/NZS 3678 Grade 300 and CSA G40.21 400W share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.