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AS/NZS 3678 Grade 300 vs ASTM A572 Gr.65

Related Material — 62.4% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 300 (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 300 is typically used for general fabrication, structural members, high-rise buildings, bridges, storage tanks, 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 300 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 300 vs ASTM A572 Gr.65 is a 92.9% match. As per mechanical properties, the match is 1.3%. Combined, this makes them a related material overall at 62.4%.

Frequently Compared With AS/NZS 3678 Grade 300:
AS/NZS 3679.1 300 AS/NZS 3679.1 350 CSA G40.21 480W ASTM A1008 SS Grade 80 CSA G40.21 400W GOST 19281 09G2S CSA G40.21 260W CSA G40.21 300W ASTM A1008 SS Grade 50 CSA G40.21 400A CSA G40.21 350W ASTM A283C
Match Breakdown
CHEMISTRY MATCH
92.9%
MECHANICAL MATCH
1.3%
OVERALL
62.4%
Specifications
Property AS/NZS 3678 Grade 300 ASTM A572 Gr.65
Standard AS/NZS 3678:2016 ASTM A572
Category Structural Steel Structural Steel
C (%) <=0.22 0.23 max
Mn (%) <=1.70 1.35 max
Si (%) <=0.50 0.40 max
P (%) <=0.040 0.040 max
S (%) <=0.040 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 300 ASTM A572 Gr.65
Tensile Strength 430-560 MPa 550-690 MPa
Yield Strength 300 MPa min 450 MPa min
Elongation 22% min 18-21%
Hardness Not specified 170-220 HB
Typical Applications
AS/NZS 3678 Grade 300
General fabrication, structural members, high-rise buildings, bridges, storage tanks
ASTM A572 Gr.65
Used for bridges, buildings, transmission towers, construction equipment, offshore structures, and structural members.
Key Differences
Can AS/NZS 3678 Grade 300 Be Substituted With ASTM A572 Gr.65?
AS/NZS 3678 Grade 300 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 300
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–3100 mm (98.43–122.05 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 300
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 300 and ASTM A572 Gr.65?
ASTM A572 Gr.65 specifies V, Nb which are not specified for AS/NZS 3678 Grade 300.
Can AS/NZS 3678 Grade 300 be substituted with ASTM A572 Gr.65?
AS/NZS 3678 Grade 300 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.