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CSA G40.21 400W vs ASTM A1008 SS Grade 80

Related Material — 65.6% match based on chemical composition and mechanical property overlap.

CSA G40.21 400W (CSA G40.21-13 (R2023)) and ASTM A1008 SS Grade 80 (ASTM A1008) 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 A1008 SS Grade 80 is commonly used for cold-rolled high-strength structural steel sheet, higher strength grade; automotive structural/reinforcement components, cold-formed high-strength parts. CSA G40.21 400W is defined under Canadian Standards Association (CSA), originating from Canada, while ASTM A1008 SS Grade 80 is defined under ASTM International, originating from United States.

As per chemical composition, CSA G40.21 400W vs ASTM A1008 SS Grade 80 is a 98.4% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 65.6%.

Frequently Compared With CSA G40.21 400W:
AS/NZS 1595 C450 AS/NZS 3679.1 300 CSA G40.21 300W AS/NZS 3679.1 350 IS 2062 E250A IS 2062 E250B0 GOST 19281 09G2S AS/NZS 1595 C350 ASTM A1008 SS Grade 50 CSA G40.21 350W CSA G40.21 400A ASTM A283C
Match Breakdown
CHEMISTRY MATCH
98.4%
MECHANICAL MATCH
0%
OVERALL
65.6%
Specifications
Property CSA G40.21 400W ASTM A1008 SS Grade 80
Standard CSA G40.21-13 (R2023) ASTM A1008
Category Structural Steel Structural Steel
C (%) max 0.23 <=0.25
Mn (%) max 1.6 <=1.65
Si (%) max 0.5 <=0.50
P (%) max 0.035 <=0.040
S (%) max 0.035 <=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 400W ASTM A1008 SS Grade 80
Yield Strength 400 MPa min 550 MPa min
Tensile Strength 520-690 MPa 570 MPa min
Elongation Not specified 10% min
Typical Applications
CSA G40.21 400W
Heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.
ASTM A1008 SS Grade 80
Cold-rolled high-strength structural steel sheet, higher strength grade; automotive structural/reinforcement components, cold-formed high-strength parts
Can CSA G40.21 400W Be Substituted With ASTM A1008 SS Grade 80?
CSA G40.21 400W and ASTM A1008 SS Grade 80 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 A1008 SS Grade 80
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–3700 mm (98.43–145.67 in)
On M-EX Right Now
CSA G40.21 400W
2 active listings and RFQs →
ASTM A1008 SS Grade 80
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 400W and ASTM A1008 SS Grade 80?
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 A1008 SS Grade 80?
CSA G40.21 400W and ASTM A1008 SS Grade 80 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.