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ASTM A283C vs AS/NZS 3678 Grade 450

Strong Match — 93.4% match based on chemical composition and mechanical property overlap.

ASTM A283C (ASTM A283) and AS/NZS 3678 Grade 450 (AS/NZS 3678:2016) are both steel grades. Both fall under the Structural Steel category. ASTM A283C is typically used for used for structural fabrication, storage tanks, buildings, bridges, machinery bases, and welded structures., while AS/NZS 3678 Grade 450 is commonly used for heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.. ASTM A283C is defined under ASTM International, originating from United States, while AS/NZS 3678 Grade 450 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.

As per chemical composition, ASTM A283C vs AS/NZS 3678 Grade 450 is a 93.4% 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 93.4%.

Frequently Compared With ASTM A283C:
ASTM A1008 SS Grade 50 CSA G40.21 260W ASTM A1008 SS Grade 80 ASTM A572 Grade 50 ASTM A572 Gr.65 CSA G40.21 480W CSA G40.21 400W AS/NZS 3679.1 350 CSA G40.21 300W AS/NZS 3679.1 300 CSA G40.21 400A GOST 19281 09G2S
Match Breakdown
CHEMISTRY MATCH
93.4%
MECHANICAL MATCH
No shared data
OVERALL
93.4%
Specifications
Property ASTM A283C AS/NZS 3678 Grade 450
Standard ASTM A283 AS/NZS 3678:2016
Category Structural Steel Structural Steel
C (%) 0.24 max max 0.2
Mn (%) 0.90 max max 1.6
P (%) 0.035 max max 0.03
S (%) 0.040 max max 0.03
Si (%) 0.40 max 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 ASTM A283C AS/NZS 3678 Grade 450
Tensile Strength 380-515 MPa Not specified
Yield Strength 205 MPa min Not specified
Elongation 23-27% Not specified
Hardness 120-170 HB Not specified
Typical Applications
ASTM A283C
Used for structural fabrication, storage tanks, buildings, bridges, machinery bases, and welded structures.
AS/NZS 3678 Grade 450
Heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.
Can ASTM A283C Be Substituted With AS/NZS 3678 Grade 450?
ASTM A283C 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 ASTM A283C 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
ASTM A283C
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2900–3700 mm (114.17–145.67 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
ASTM A283C
2 active listings and RFQs →
AS/NZS 3678 Grade 450
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A283C and AS/NZS 3678 Grade 450?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A283C be substituted with AS/NZS 3678 Grade 450?
ASTM A283C 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 ASTM A283C in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.