Post Stock Login Register

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

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

CSA G40.21 300W (CSA G40.21-13 (R2023)) and AS/NZS 3678 Grade 250 (AS/NZS 3678:2016) are both steel grades. Both fall under the Structural Steel category. CSA G40.21 300W is typically used for structural fabrication,bridges,buildings,machinery frames,general construction,welded structures, while AS/NZS 3678 Grade 250 is commonly used for structural fabrication,buildings,bridges,general construction,machinery frames,welded structures,plates. CSA G40.21 300W is defined under Canadian Standards Association (CSA), originating from Canada, while AS/NZS 3678 Grade 250 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.

As per chemical composition, CSA G40.21 300W vs AS/NZS 3678 Grade 250 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 CSA G40.21 300W:
CSA G40.21 400W AS/NZS 1595 C350 ASTM A1008 SS Grade 50 CSA G40.21 480W GOST 19281 09G2S CSA G40.21 400A AS/NZS 1595 C450 CSA G40.21 260W ASTM A572 Grade 50 IS 2062 E250B0 ASTM A572 Gr.65 IS 2062 E250A
Match Breakdown
CHEMISTRY MATCH
98.4%
MECHANICAL MATCH
24.1%
OVERALL
73.6%
Specifications
Property CSA G40.21 300W AS/NZS 3678 Grade 250
Standard CSA G40.21-13 (R2023) AS/NZS 3678:2016
Category Structural Steel Structural Steel
C (%) <=0.23 <=0.22
Mn (%) <=1.50 <=1.70
P (%) <=0.040 <=0.040
S (%) <=0.050 <=0.040
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 300W AS/NZS 3678 Grade 250
Tensile Strength 450-620 MPa 410-560 MPa
Yield Strength 300 MPa min 250 MPa min
Elongation 20-23 % 22-25 %
Typical Applications
CSA G40.21 300W
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures
AS/NZS 3678 Grade 250
structural fabrication,buildings,bridges,general construction,machinery frames,welded structures,plates
Can CSA G40.21 300W Be Substituted With AS/NZS 3678 Grade 250?
CSA G40.21 300W and AS/NZS 3678 Grade 250 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 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)
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)
On M-EX Right Now
CSA G40.21 300W
2 active listings and RFQs →
AS/NZS 3678 Grade 250
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 300W and AS/NZS 3678 Grade 250?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can CSA G40.21 300W be substituted with AS/NZS 3678 Grade 250?
CSA G40.21 300W and AS/NZS 3678 Grade 250 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.