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AS/NZS 3679.1 300 vs AS/NZS 3678 Grade 450

Strong Match — 96.9% match based on chemical composition and mechanical property overlap.

AS/NZS 3679.1 300 (AS/NZS 3679.1:2016) and AS/NZS 3678 Grade 450 (AS/NZS 3678:2016) are both steel grades. Both fall under the Structural Steel category. AS/NZS 3679.1 300 is typically used for hot-rolled structural bars and sections for general structural framing, while AS/NZS 3678 Grade 450 is commonly used for heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.. AS/NZS 3679.1 300 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand, while AS/NZS 3678 Grade 450 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.

As per chemical composition, AS/NZS 3679.1 300 vs AS/NZS 3678 Grade 450 is a 96.9% 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 96.9%.

Frequently Compared With AS/NZS 3679.1 300:
IS 2062 E250B0 CSA G40.21 480W CSA G40.21 400W AS/NZS 1595 C450 ASTM A1008 SS Grade 80 AS/NZS 1595 C350 ASTM A1008 SS Grade 50 IS 2062 E250A ASTM A572 Grade 50 ASTM A572 Gr.65 CSA G40.21 260W CSA G40.21 300W
Match Breakdown
CHEMISTRY MATCH
96.9%
MECHANICAL MATCH
No shared data
OVERALL
96.9%
Specifications
Property AS/NZS 3679.1 300 AS/NZS 3678 Grade 450
Standard AS/NZS 3679.1:2016 AS/NZS 3678:2016
Category Structural Steel Structural Steel
C (%) <=0.22 max 0.2
Mn (%) <=1.70 max 1.6
Si (%) <=0.50 max 0.55
P (%) <=0.040 max 0.03
S (%) <=0.040 max 0.03
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 3679.1 300 AS/NZS 3678 Grade 450
Tensile Strength 440-600 MPa Not specified
Yield Strength 300 MPa min Not specified
Elongation 22% min Not specified
Typical Applications
AS/NZS 3679.1 300
Hot-rolled structural bars and sections for general structural framing
AS/NZS 3678 Grade 450
Heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.
Can AS/NZS 3679.1 300 Be Substituted With AS/NZS 3678 Grade 450?
AS/NZS 3679.1 300 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 AS/NZS 3679.1 300 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 3679.1 300
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2700–2700 mm (106.3–106.3 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
AS/NZS 3679.1 300
2 active listings and RFQs →
AS/NZS 3678 Grade 450
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3679.1 300 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 AS/NZS 3679.1 300 be substituted with AS/NZS 3678 Grade 450?
AS/NZS 3679.1 300 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 AS/NZS 3679.1 300 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.