Post Stock Login Register

AS/NZS 3678 Grade 250 vs CSA G40.21 400A

Related Material — 62.2% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 250 (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 250 is typically used for structural fabrication,buildings,bridges,general construction,machinery frames,welded structures,plates, 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 250 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 250 vs CSA G40.21 400A is a 90.7% match. As per mechanical properties, the match is 5.1%. Combined, this makes them a related material overall at 62.2%.

Frequently Compared With AS/NZS 3678 Grade 250:
ASTM A1008 SS Grade 50 GOST 19281 09G2S CSA G40.21 260W AS/NZS 3679.1 350 AS/NZS 3679.1 300 CSA G40.21 400W CSA G40.21 480W CSA G40.21 300W CSA G40.21 350W ASTM A1008 SS Grade 80 ASTM A283C ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
90.7%
MECHANICAL MATCH
5.1%
OVERALL
62.2%
Specifications
Property AS/NZS 3678 Grade 250 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 250 CSA G40.21 400A
Tensile Strength 410-560 MPa 520-670 MPa
Yield Strength 250 MPa min 400 MPa min
Elongation 22-25 % 17% min
Impact Not specified 27J at 0°C
Typical Applications
AS/NZS 3678 Grade 250
structural fabrication,buildings,bridges,general construction,machinery frames,welded structures,plates
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 250 Be Substituted With CSA G40.21 400A?
AS/NZS 3678 Grade 250 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 250
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2900–3700 mm (114.17–145.67 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 250
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 250 and CSA G40.21 400A?
CSA G40.21 400A specifies Si, Cu which are not specified for AS/NZS 3678 Grade 250.
Can AS/NZS 3678 Grade 250 be substituted with CSA G40.21 400A?
AS/NZS 3678 Grade 250 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.