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KS D3503 SS400 vs AS/NZS 3678 Grade 450

Strong Match — 90.4% match based on chemical composition and mechanical property overlap.

KS D3503 SS400 (KS D 3503:2016) and AS/NZS 3678 Grade 450 (AS/NZS 3678:2016) 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 AS/NZS 3678 Grade 450 is commonly used for heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.. KS D3503 SS400 is defined under Korean Industrial Standards (KS), originating from South Korea, while AS/NZS 3678 Grade 450 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.

As per chemical composition, KS D3503 SS400 vs AS/NZS 3678 Grade 450 is a 90.4% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 90.4%.

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 CSA G40.21 260W CSA G40.21 300W ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80 ASTM A283C
Match Breakdown
CHEMISTRY MATCH
90.4%
MECHANICAL MATCH
No shared data
OVERALL
90.4%
Specifications
Property KS D3503 SS400 AS/NZS 3678 Grade 450
Standard KS D 3503:2016 AS/NZS 3678:2016
Category Structural Steel Structural Steel
C (%) <=0.25 max 0.2
Mn (%) <=1.50 max 1.6
P (%) <=0.050 max 0.03
S (%) <=0.050 max 0.03
Si (%) Not specified max 0.55
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 AS/NZS 3678 Grade 450
Tensile Strength 400-510 MPa Not specified
Yield Strength 245 MPa min Not specified
Elongation 21-23 % Not specified
Typical Applications
KS D3503 SS400
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures,plates,sections
AS/NZS 3678 Grade 450
Heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.
Key Differences
Can KS D3503 SS400 Be Substituted With AS/NZS 3678 Grade 450?
KS D3503 SS400 and AS/NZS 3678 Grade 450 overlap closely enough on chemistry and mechanical properties that AS/NZS 3678 Grade 450 is often considered as a substitute for KS D3503 SS400 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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)
AS/NZS 3678 Grade 450
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–4200 mm (98.43–165.35 in)
On M-EX Right Now
KS D3503 SS400
2 active listings and RFQs →
AS/NZS 3678 Grade 450
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between KS D3503 SS400 and AS/NZS 3678 Grade 450?
AS/NZS 3678 Grade 450 specifies Si which is not specified for KS D3503 SS400.
Can KS D3503 SS400 be substituted with AS/NZS 3678 Grade 450?
KS D3503 SS400 and AS/NZS 3678 Grade 450 overlap closely enough on chemistry and mechanical properties that AS/NZS 3678 Grade 450 is often considered as a substitute for KS D3503 SS400 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.