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KS D3503 SS400 vs ASTM A1008 SS Grade 50

Related Material — 61% match based on chemical composition and mechanical property overlap.

KS D3503 SS400 (KS D 3503:2016) and ASTM A1008 SS Grade 50 (ASTM A1008) 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 ASTM A1008 SS Grade 50 is commonly used for cold-rolled high-strength structural steel sheet; automotive structural components, cold-formed parts requiring moderate strength. KS D3503 SS400 is defined under Korean Industrial Standards (KS), originating from South Korea, while ASTM A1008 SS Grade 50 is defined under ASTM International, originating from United States.

As per chemical composition, KS D3503 SS400 vs ASTM A1008 SS Grade 50 is a 91.4% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 61%.

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 80 ASTM A283C ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
91.4%
MECHANICAL MATCH
0%
OVERALL
61%
Specifications
Property KS D3503 SS400 ASTM A1008 SS Grade 50
Standard KS D 3503:2016 ASTM A1008
Category Structural Steel Structural Steel
C (%) <=0.25 <=0.20
Mn (%) <=1.50 <=1.35
P (%) <=0.050 <=0.040
S (%) <=0.050 <=0.040
Si (%) Not specified <=0.50
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 ASTM A1008 SS Grade 50
Tensile Strength 400-510 MPa 380 MPa min
Yield Strength 245 MPa min 340 MPa min
Elongation 21-23 % 14% min
Typical Applications
KS D3503 SS400
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures,plates,sections
ASTM A1008 SS Grade 50
Cold-rolled high-strength structural steel sheet; automotive structural components, cold-formed parts requiring moderate strength
Key Differences
Can KS D3503 SS400 Be Substituted With ASTM A1008 SS Grade 50?
KS D3503 SS400 and ASTM A1008 SS Grade 50 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)
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)
On M-EX Right Now
KS D3503 SS400
2 active listings and RFQs →
ASTM A1008 SS Grade 50
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D3503 SS400 and ASTM A1008 SS Grade 50?
ASTM A1008 SS Grade 50 specifies Si which is not specified for KS D3503 SS400.
Can KS D3503 SS400 be substituted with ASTM A1008 SS Grade 50?
KS D3503 SS400 and ASTM A1008 SS Grade 50 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.