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AS/NZS 3678 Grade 450 vs ASTM A572 Gr.65

Strong Match — 90.8% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 450 (AS/NZS 3678:2016) and ASTM A572 Gr.65 (ASTM A572) 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 A572 Gr.65 is commonly used for used for bridges, buildings, transmission towers, construction equipment, offshore structures, and structural members.. AS/NZS 3678 Grade 450 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand, while ASTM A572 Gr.65 is defined under ASTM International, originating from United States.

As per chemical composition, AS/NZS 3678 Grade 450 vs ASTM A572 Gr.65 is a 90.8% 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 90.8%.

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 AS/NZS 3679.1 300 CSA G40.21 350W ASTM A1008 SS Grade 80 CSA G40.21 400A ASTM A283C ASTM A1008 SS Grade 50 AS/NZS 1595 C450
Match Breakdown
CHEMISTRY MATCH
90.8%
MECHANICAL MATCH
No shared data
OVERALL
90.8%
Specifications
Property AS/NZS 3678 Grade 450 ASTM A572 Gr.65
Standard AS/NZS 3678:2016 ASTM A572
Category Structural Steel Structural Steel
C (%) max 0.2 0.23 max
Mn (%) max 1.6 1.35 max
Si (%) max 0.55 0.40 max
P (%) max 0.03 0.040 max
S (%) max 0.03 0.050 max
V (%) Not specified 0.15 max
Nb (%) Not specified 0.05 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 A572 Gr.65
Tensile Strength Not specified 550-690 MPa
Yield Strength Not specified 450 MPa min
Elongation Not specified 18-21%
Hardness Not specified 170-220 HB
Typical Applications
AS/NZS 3678 Grade 450
Heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.
ASTM A572 Gr.65
Used for bridges, buildings, transmission towers, construction equipment, offshore structures, and structural members.
Key Differences
Can AS/NZS 3678 Grade 450 Be Substituted With ASTM A572 Gr.65?
AS/NZS 3678 Grade 450 and ASTM A572 Gr.65 overlap closely enough on chemistry and mechanical properties that ASTM A572 Gr.65 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 A572 Gr.65
Plate → (4 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2600–4400 mm (102.36–173.23 in)
On M-EX Right Now
AS/NZS 3678 Grade 450
2 active listings and RFQs →
ASTM A572 Gr.65
4 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3678 Grade 450 and ASTM A572 Gr.65?
ASTM A572 Gr.65 specifies V, Nb which are not specified for AS/NZS 3678 Grade 450.
Can AS/NZS 3678 Grade 450 be substituted with ASTM A572 Gr.65?
AS/NZS 3678 Grade 450 and ASTM A572 Gr.65 overlap closely enough on chemistry and mechanical properties that ASTM A572 Gr.65 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.