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KS D3503 SS400 vs CSA G40.21 400A

Related Material — 59.6% match based on chemical composition and mechanical property overlap.

KS D3503 SS400 (KS D 3503:2016) and CSA G40.21 400A (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel category. KS D3503 SS400 is typically used for structural fabrication,bridges,buildings,machinery frames,general construction,welded structures,plates,sections, 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. KS D3503 SS400 is defined under Korean Industrial Standards (KS), originating from South Korea, while CSA G40.21 400A is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, KS D3503 SS400 vs CSA G40.21 400A is a 89.4% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 59.6%.

Frequently Compared With KS D3503 SS400:
CSA G40.21 350W AS/NZS 3679.1 350 AS/NZS 3679.1 300 CSA G40.21 400W GOST 19281 09G2S CSA G40.21 480W ASTM A1008 SS Grade 50 CSA G40.21 260W CSA G40.21 300W ASTM A1008 SS Grade 80 ASTM A283C ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
89.4%
MECHANICAL MATCH
0%
OVERALL
59.6%
Specifications
Property KS D3503 SS400 CSA G40.21 400A
Standard KS D 3503:2016 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) <=0.25 <=0.23
Mn (%) <=1.50 <=1.60
P (%) <=0.050 <=0.035
S (%) <=0.050 <=0.035
Si (%) Not specified <=0.40
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 KS D3503 SS400 CSA G40.21 400A
Tensile Strength 400-510 MPa 520-670 MPa
Yield Strength 245 MPa min 400 MPa min
Elongation 21-23 % 17% min
Impact Not specified 27J at 0°C
Typical Applications
KS D3503 SS400
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures,plates,sections
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 KS D3503 SS400 Be Substituted With CSA G40.21 400A?
KS D3503 SS400 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
KS D3503 SS400
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3000–3700 mm (118.11–145.67 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
KS D3503 SS400
2 active listings and RFQs →
CSA G40.21 400A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D3503 SS400 and CSA G40.21 400A?
CSA G40.21 400A specifies Si, Cu which are not specified for KS D3503 SS400.
Can KS D3503 SS400 be substituted with CSA G40.21 400A?
KS D3503 SS400 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.