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CSA G40.21 400W vs ASTM A283C

Related Material — 63.8% match based on chemical composition and mechanical property overlap.

CSA G40.21 400W (CSA G40.21-13 (R2023)) and ASTM A283C (ASTM A283) 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 ASTM A283C is commonly used for used for structural fabrication, storage tanks, buildings, bridges, machinery bases, and welded structures.. CSA G40.21 400W is defined under Canadian Standards Association (CSA), originating from Canada, while ASTM A283C is defined under ASTM International, originating from United States.

As per chemical composition, CSA G40.21 400W vs ASTM A283C is a 95.6% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 63.8%.

Frequently Compared With CSA G40.21 400W:
AS/NZS 1595 C450 CSA G40.21 300W AS/NZS 3679.1 300 AS/NZS 3679.1 350 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 ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
95.6%
MECHANICAL MATCH
0%
OVERALL
63.8%
Specifications
Property CSA G40.21 400W ASTM A283C
Standard CSA G40.21-13 (R2023) ASTM A283
Category Structural Steel Structural Steel
C (%) max 0.23 0.24 max
Mn (%) max 1.6 0.90 max
Si (%) max 0.5 0.40 max
P (%) max 0.035 0.035 max
S (%) max 0.035 0.040 max
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 ASTM A283C
Yield Strength 400 MPa min 205 MPa min
Tensile Strength 520-690 MPa 380-515 MPa
Elongation Not specified 23-27%
Hardness Not specified 120-170 HB
Typical Applications
CSA G40.21 400W
Heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.
ASTM A283C
Used for structural fabrication, storage tanks, buildings, bridges, machinery bases, and welded structures.
Can CSA G40.21 400W Be Substituted With ASTM A283C?
CSA G40.21 400W and ASTM A283C 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
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)
ASTM A283C
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 400W
2 active listings and RFQs →
ASTM A283C
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 400W and ASTM A283C?
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 ASTM A283C?
CSA G40.21 400W and ASTM A283C 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.