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AS/NZS 3678 Grade 450 vs ASTM A283C

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

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

As per chemical composition, AS/NZS 3678 Grade 450 vs ASTM A283C 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 AS/NZS 3678 Grade 450:
IS 2062 E250A AS/NZS 3679.1 350 AS/NZS 1595 C350 CSA G40.21 300W IS 2062 E250B0 CSA G40.21 350W CSA G40.21 400A ASTM A1008 SS Grade 80 AS/NZS 3679.1 300 ASTM A1008 SS Grade 50 ASTM A572 Gr.65 AS/NZS 1595 C450
Match Breakdown
CHEMISTRY MATCH
93.4%
MECHANICAL MATCH
No shared data
OVERALL
93.4%
Specifications
Property AS/NZS 3678 Grade 450 ASTM A283C
Standard AS/NZS 3678:2016 ASTM A283
Category Structural Steel Structural Steel
C (%) max 0.2 0.24 max
Mn (%) max 1.6 0.90 max
Si (%) max 0.55 0.40 max
P (%) max 0.03 0.035 max
S (%) max 0.03 0.040 max
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property AS/NZS 3678 Grade 450 ASTM A283C
Tensile Strength Not specified 380-515 MPa
Yield Strength Not specified 205 MPa min
Elongation Not specified 23-27%
Hardness Not specified 120-170 HB
Typical Applications
AS/NZS 3678 Grade 450
Heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.
ASTM A283C
Used for structural fabrication, storage tanks, buildings, bridges, machinery bases, and welded structures.
Can AS/NZS 3678 Grade 450 Be Substituted With ASTM A283C?
AS/NZS 3678 Grade 450 and ASTM A283C overlap closely enough on chemistry and mechanical properties that ASTM A283C is often considered as a substitute for AS/NZS 3678 Grade 450 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
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)
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)
On M-EX Right Now
AS/NZS 3678 Grade 450
2 active listings and RFQs →
ASTM A283C
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3678 Grade 450 and ASTM A283C?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can AS/NZS 3678 Grade 450 be substituted with ASTM A283C?
AS/NZS 3678 Grade 450 and ASTM A283C overlap closely enough on chemistry and mechanical properties that ASTM A283C is often considered as a substitute for AS/NZS 3678 Grade 450 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.