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ASTM A1008 SS Grade 50 vs CSA G40.21 400A

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

ASTM A1008 SS Grade 50 (ASTM A1008) and CSA G40.21 400A (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel category. ASTM A1008 SS Grade 50 is typically used for cold-rolled high-strength structural steel sheet; automotive structural components, cold-formed parts requiring moderate strength, 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. ASTM A1008 SS Grade 50 is defined under ASTM International, originating from United States, while CSA G40.21 400A is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, ASTM A1008 SS Grade 50 vs CSA G40.21 400A is a 93.3% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 62.2%.

Frequently Compared With ASTM A1008 SS Grade 50:
AS/NZS 1595 C450 GOST 19281 09G2S AS/NZS 3679.1 350 CSA G40.21 300W ASTM A1008 SS Grade 80 AS/NZS 1595 C350 ASTM A283C AS/NZS 3679.1 300 CSA G40.21 400W CSA G40.21 260W CSA G40.21 350W CSA G40.21 480W
Match Breakdown
CHEMISTRY MATCH
93.3%
MECHANICAL MATCH
0%
OVERALL
62.2%
Specifications
Property ASTM A1008 SS Grade 50 CSA G40.21 400A
Standard ASTM A1008 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) <=0.20 <=0.23
Mn (%) <=1.35 <=1.60
Si (%) <=0.50 <=0.40
P (%) <=0.040 <=0.035
S (%) <=0.040 <=0.035
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 ASTM A1008 SS Grade 50 CSA G40.21 400A
Tensile Strength 380 MPa min 520-670 MPa
Yield Strength 340 MPa min 400 MPa min
Elongation 14% min 17% min
Impact Not specified 27J at 0°C
Typical Applications
ASTM A1008 SS Grade 50
Cold-rolled high-strength structural steel sheet; automotive structural components, cold-formed parts requiring moderate strength
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 ASTM A1008 SS Grade 50 Be Substituted With CSA G40.21 400A?
ASTM A1008 SS Grade 50 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
ASTM A1008 SS Grade 50
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2700–3400 mm (106.3–133.86 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
ASTM A1008 SS Grade 50
2 active listings and RFQs →
CSA G40.21 400A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A1008 SS Grade 50 and CSA G40.21 400A?
CSA G40.21 400A specifies Cu which is not specified for ASTM A1008 SS Grade 50.
Can ASTM A1008 SS Grade 50 be substituted with CSA G40.21 400A?
ASTM A1008 SS Grade 50 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.