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

Close Alternative — 81.7% match based on chemical composition and mechanical property overlap.

CSA G40.21 400W (CSA G40.21-13 (R2023)) and AS/NZS 3678 Grade 400 (AS/NZS 3678:2016) are both steel grades. Both fall under the Structural Steel category. CSA G40.21 400W is typically used for heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment., while AS/NZS 3678 Grade 400 is commonly used for heavy structural fabrication, crane booms, mining machinery, earthmoving equipment, structural columns.. CSA G40.21 400W is defined under Canadian Standards Association (CSA), originating from Canada, while AS/NZS 3678 Grade 400 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.

As per chemical composition, CSA G40.21 400W vs AS/NZS 3678 Grade 400 is a 97.5% match. As per mechanical properties, the match is 50%. Combined, this makes them a close alternative overall at 81.7%.

Frequently Compared With CSA G40.21 400W:
AS/NZS 1595 C450 CSA G40.21 300W AS/NZS 3679.1 350 AS/NZS 3679.1 300 ASTM A1008 SS Grade 80 IS 2062 E250A IS 2062 E250B0 GOST 19281 09G2S AS/NZS 1595 C350 ASTM A1008 SS Grade 50 CSA G40.21 350W CSA G40.21 400A
Match Breakdown
CHEMISTRY MATCH
97.5%
MECHANICAL MATCH
50%
OVERALL
81.7%
Specifications
Property CSA G40.21 400W AS/NZS 3678 Grade 400
Standard CSA G40.21-13 (R2023) AS/NZS 3678:2016
Category Structural Steel Structural Steel
C (%) max 0.23 max 0.2
Mn (%) max 1.6 max 1.6
Si (%) max 0.5 max 0.55
P (%) max 0.035 max 0.03
S (%) max 0.035 max 0.03
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 400W AS/NZS 3678 Grade 400
Yield Strength 400 MPa min 400 MPa min (t<=12mm)
Tensile Strength 520-690 MPa ~520 MPa min (approx, equivalent to ASTM A572 Gr.60)
Typical Applications
CSA G40.21 400W
Heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.
AS/NZS 3678 Grade 400
Heavy structural fabrication, crane booms, mining machinery, earthmoving equipment, structural columns.
Can CSA G40.21 400W Be Substituted With AS/NZS 3678 Grade 400?
CSA G40.21 400W and AS/NZS 3678 Grade 400 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 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)
AS/NZS 3678 Grade 400
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3000–3700 mm (118.11–145.67 in)
On M-EX Right Now
CSA G40.21 400W
2 active listings and RFQs →
AS/NZS 3678 Grade 400
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 400W and AS/NZS 3678 Grade 400?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can CSA G40.21 400W be substituted with AS/NZS 3678 Grade 400?
CSA G40.21 400W and AS/NZS 3678 Grade 400 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.