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KS D3503 SS400 vs CSA G40.21 260W

Close Alternative — 70.3% match based on chemical composition and mechanical property overlap.

KS D3503 SS400 (KS D 3503:2016) and CSA G40.21 260W (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 260W is commonly used for bridges, buildings, general structural fabrication, storage tanks, older infrastructure projects.. KS D3503 SS400 is defined under Korean Industrial Standards (KS), originating from South Korea, while CSA G40.21 260W is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, KS D3503 SS400 vs CSA G40.21 260W is a 92.2% match. As per mechanical properties, the match is 26.3%. Combined, this makes them a close alternative overall at 70.3%.

Frequently Compared With KS D3503 SS400:
CSA G40.21 350W AS/NZS 3679.1 350 CSA G40.21 400W AS/NZS 3679.1 300 GOST 19281 09G2S CSA G40.21 400A CSA G40.21 480W ASTM A1008 SS Grade 50 CSA G40.21 300W ASTM A1008 SS Grade 80 ASTM A283C ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
92.2%
MECHANICAL MATCH
26.3%
OVERALL
70.3%
Specifications
Property KS D3503 SS400 CSA G40.21 260W
Standard KS D 3503:2016 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) <=0.25 max 0.23
Mn (%) <=1.50 max 1.4
P (%) <=0.050 max 0.035
S (%) <=0.050 max 0.035
Si (%) Not specified max 0.4
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 260W
Tensile Strength 400-510 MPa 410-590 MPa
Yield Strength 245 MPa min 260 MPa min
Elongation 21-23 % Not specified
Typical Applications
KS D3503 SS400
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures,plates,sections
CSA G40.21 260W
Bridges, buildings, general structural fabrication, storage tanks, older infrastructure projects.
Key Differences
Can KS D3503 SS400 Be Substituted With CSA G40.21 260W?
KS D3503 SS400 and CSA G40.21 260W 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
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 260W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3400–4000 mm (133.86–157.48 in)
On M-EX Right Now
KS D3503 SS400
2 active listings and RFQs →
CSA G40.21 260W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D3503 SS400 and CSA G40.21 260W?
CSA G40.21 260W specifies Si which is not specified for KS D3503 SS400.
Can KS D3503 SS400 be substituted with CSA G40.21 260W?
KS D3503 SS400 and CSA G40.21 260W 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.