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AS/NZS 3678 Grade 350 vs CSA G40.21 400A

Related Material — 66.3% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 350 (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 350 is typically used for bridges,heavy structures,mining equipment,cranes,offshore platforms,pressure vessels,structural components, 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 350 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 350 vs CSA G40.21 400A is a 90.7% match. As per mechanical properties, the match is 17.5%. Combined, this makes them a related material overall at 66.3%.

Frequently Compared With AS/NZS 3678 Grade 350:
CSA G40.21 260W CSA G40.21 300W AS/NZS 3679.1 300 CSA G40.21 350W CSA G40.21 480W GOST 19281 09G2S CSA G40.21 400W AS/NZS 3679.1 350 ASTM A572 Gr.65 ASTM A1008 SS Grade 80 ASTM A1008 SS Grade 50 ASTM A283C
Match Breakdown
CHEMISTRY MATCH
90.7%
MECHANICAL MATCH
17.5%
OVERALL
66.3%
Specifications
Property AS/NZS 3678 Grade 350 CSA G40.21 400A
Standard AS/NZS 3678:2016 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) <=0.22 <=0.23
Mn (%) <=1.70 <=1.60
P (%) <=0.040 <=0.035
S (%) <=0.040 <=0.035
Si (%) Not specified <=0.40
Cu (%) Not specified 0.20-0.40
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 350 CSA G40.21 400A
Tensile Strength 480-620 MPa 520-670 MPa
Yield Strength 360 MPa min 400 MPa min
Elongation 18-22 % 17% min
Impact Not specified 27J at 0°C
Typical Applications
AS/NZS 3678 Grade 350
bridges,heavy structures,mining equipment,cranes,offshore platforms,pressure vessels,structural components
CSA G40.21 400A
Atmospheric corrosion-resistant (weathering) structural steel; exposed bridge girders and structural members where high strength and weathering resistance are both needed
Key Differences
Can AS/NZS 3678 Grade 350 Be Substituted With CSA G40.21 400A?
AS/NZS 3678 Grade 350 and CSA G40.21 400A 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 350
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3300–4500 mm (129.92–177.17 in)
CSA G40.21 400A
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2800–4200 mm (110.24–165.35 in)
On M-EX Right Now
AS/NZS 3678 Grade 350
2 active listings and RFQs →
CSA G40.21 400A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3678 Grade 350 and CSA G40.21 400A?
CSA G40.21 400A specifies Si, Cu which are not specified for AS/NZS 3678 Grade 350.
Can AS/NZS 3678 Grade 350 be substituted with CSA G40.21 400A?
AS/NZS 3678 Grade 350 and CSA G40.21 400A 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.