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KS D3503 SS400 vs EN 10025-2 S250

Close Alternative — 71.2% match based on chemical composition and mechanical property overlap.

KS D3503 SS400 (KS D 3503:2016) and EN 10025-2 S250 (EN 10025-2:2019) 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 EN 10025-2 S250 is commonly used for used for fabricated structures, beams, support frames, machinery bases, towers, and construction components.. KS D3503 SS400 is defined under Korean Industrial Standards (KS), originating from South Korea, while EN 10025-2 S250 is defined under European Standard (EN), originating from Europe.

As per chemical composition, KS D3503 SS400 vs EN 10025-2 S250 is a 92.1% match. As per mechanical properties, the match is 29.2%. Combined, this makes them a close alternative overall at 71.2%.

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 400A CSA G40.21 480W CSA G40.21 260W CSA G40.21 300W ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80 ASTM A283C
Match Breakdown
CHEMISTRY MATCH
92.1%
MECHANICAL MATCH
29.2%
OVERALL
71.2%
Specifications
Property KS D3503 SS400 EN 10025-2 S250
Standard KS D 3503:2016 EN 10025-2:2019
Category Structural Steel Structural Steel
C (%) <=0.25 0.20 max
Mn (%) <=1.50 1.50 max
P (%) <=0.050 0.040 max
S (%) <=0.050 0.040 max
Si (%) Not specified 0.40 max
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 EN 10025-2 S250
Tensile Strength 400-510 MPa 410-560 MPa
Yield Strength 245 MPa min 250 MPa min
Elongation 21-23 % 22-25%
Hardness Not specified 120-170 HB
Typical Applications
KS D3503 SS400
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures,plates,sections
EN 10025-2 S250
Used for fabricated structures, beams, support frames, machinery bases, towers, and construction components.
Key Differences
Can KS D3503 SS400 Be Substituted With EN 10025-2 S250?
KS D3503 SS400 and EN 10025-2 S250 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)
EN 10025-2 S250
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3300–3500 mm (129.92–137.8 in)
On M-EX Right Now
KS D3503 SS400
2 active listings and RFQs →
EN 10025-2 S250
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D3503 SS400 and EN 10025-2 S250?
EN 10025-2 S250 specifies Si which is not specified for KS D3503 SS400.
Can KS D3503 SS400 be substituted with EN 10025-2 S250?
KS D3503 SS400 and EN 10025-2 S250 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.