AS/NZS 3678 Grade 250 vs CSA G40.21 300W

Close Alternative — 73.6% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 250 (AS/NZS 3678:2016) and CSA G40.21 300W (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 300W is commonly used for structural fabrication,bridges,buildings,machinery frames,general construction,welded structures. AS/NZS 3678 Grade 250 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand, while CSA G40.21 300W is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, AS/NZS 3678 Grade 250 vs CSA G40.21 300W is a 98.4% match. As per mechanical properties, the match is 24.1%. Combined, this makes them a close alternative overall at 73.6%.

Frequently Compared With AS/NZS 3678 Grade 250:
ASTM A1008 SS Grade 50 CSA G40.21 400A GOST 19281 09G2S AS/NZS 3679.1 350 CSA G40.21 260W AS/NZS 3679.1 300 CSA G40.21 400W CSA G40.21 480W CSA G40.21 350W ASTM A1008 SS Grade 80 ASTM A283C ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
98.4%
MECHANICAL MATCH
24.1%
OVERALL
73.6%
Specifications
Property AS/NZS 3678 Grade 250 CSA G40.21 300W
Standard AS/NZS 3678:2016 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) <=0.22 <=0.23
Mn (%) <=1.70 <=1.50
P (%) <=0.040 <=0.040
S (%) <=0.040 <=0.050
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 300W
Tensile Strength 410-560 MPa 450-620 MPa
Yield Strength 250 MPa min 300 MPa min
Elongation 22-25 % 20-23 %
Typical Applications
AS/NZS 3678 Grade 250
structural fabrication,buildings,bridges,general construction,machinery frames,welded structures,plates
CSA G40.21 300W
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures
Can AS/NZS 3678 Grade 250 Be Substituted With CSA G40.21 300W?
AS/NZS 3678 Grade 250 and CSA G40.21 300W 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
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 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)
On M-EX Right Now
AS/NZS 3678 Grade 250
2 active listings and RFQs →
CSA G40.21 300W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3678 Grade 250 and CSA G40.21 300W?
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 250 be substituted with CSA G40.21 300W?
AS/NZS 3678 Grade 250 and CSA G40.21 300W 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.