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AS/NZS 3678 Grade 400 vs ASTM A572 Gr.65

Related Material — 60.5% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 400 (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 400 is typically used for heavy structural fabrication, crane booms, mining machinery, earthmoving equipment, structural columns., 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 400 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 400 vs ASTM A572 Gr.65 is a 90.8% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 60.5%.

Frequently Compared With AS/NZS 3678 Grade 400:
AS/NZS 1595 C450 AS/NZS 3679.1 300 AS/NZS 1595 C350 AS/NZS 3679.1 350 IS 2062 E250A IS 2062 E250B0 ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80 ASTM A283C CSA G40.21 300W CSA G40.21 400A ASTM A572 Grade 50
Match Breakdown
CHEMISTRY MATCH
90.8%
MECHANICAL MATCH
0%
OVERALL
60.5%
Specifications
Property AS/NZS 3678 Grade 400 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 400 ASTM A572 Gr.65
Yield Strength 400 MPa min (t<=12mm) 450 MPa min
Tensile Strength ~520 MPa min (approx, equivalent to ASTM A572 Gr.60) 550-690 MPa
Elongation Not specified 18-21%
Hardness Not specified 170-220 HB
Typical Applications
AS/NZS 3678 Grade 400
Heavy structural fabrication, crane booms, mining machinery, earthmoving equipment, structural columns.
ASTM A572 Gr.65
Used for bridges, buildings, transmission towers, construction equipment, offshore structures, and structural members.
Key Differences
Can AS/NZS 3678 Grade 400 Be Substituted With ASTM A572 Gr.65?
AS/NZS 3678 Grade 400 and ASTM A572 Gr.65 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
AS/NZS 3678 Grade 400
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)
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 400
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 400 and ASTM A572 Gr.65?
ASTM A572 Gr.65 specifies V, Nb which are not specified for AS/NZS 3678 Grade 400.
Can AS/NZS 3678 Grade 400 be substituted with ASTM A572 Gr.65?
AS/NZS 3678 Grade 400 and ASTM A572 Gr.65 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.