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AS/NZS 3678 Grade 350 vs AS/NZS 3679.1 300

Close Alternative — 70.6% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 350 (AS/NZS 3678:2016) and AS/NZS 3679.1 300 (AS/NZS 3679.1:2016) are both steel grades. Both fall under the Structural Steel category. AS/NZS 3678 Grade 350 is typically used for bridges,heavy structures,mining equipment,cranes,offshore platforms,pressure vessels,structural components, while AS/NZS 3679.1 300 is commonly used for hot-rolled structural bars and sections for general structural framing. AS/NZS 3678 Grade 350 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand, while AS/NZS 3679.1 300 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.

As per chemical composition, AS/NZS 3678 Grade 350 vs AS/NZS 3679.1 300 is a 94.9% match. As per mechanical properties, the match is 22.2%. Combined, this makes them a close alternative overall at 70.6%.

Frequently Compared With AS/NZS 3678 Grade 350:
CSA G40.21 260W CSA G40.21 300W CSA G40.21 350W CSA G40.21 400A CSA G40.21 480W GOST 19281 09G2S CSA G40.21 400W AS/NZS 3679.1 350 ASTM A572 Gr.65 ASTM A1008 SS Grade 80 ASTM A1008 SS Grade 50 ASTM A283C
Match Breakdown
CHEMISTRY MATCH
94.9%
MECHANICAL MATCH
22.2%
OVERALL
70.6%
Specifications
Property AS/NZS 3678 Grade 350 AS/NZS 3679.1 300
Standard AS/NZS 3678:2016 AS/NZS 3679.1:2016
Category Structural Steel Structural Steel
C (%) <=0.22 <=0.22
Mn (%) <=1.70 <=1.70
P (%) <=0.040 <=0.040
S (%) <=0.040 <=0.040
Si (%) Not specified <=0.50
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 350 AS/NZS 3679.1 300
Tensile Strength 480-620 MPa 440-600 MPa
Yield Strength 360 MPa min 300 MPa min
Elongation 18-22 % 22% min
Typical Applications
AS/NZS 3678 Grade 350
bridges,heavy structures,mining equipment,cranes,offshore platforms,pressure vessels,structural components
AS/NZS 3679.1 300
Hot-rolled structural bars and sections for general structural framing
Key Differences
Can AS/NZS 3678 Grade 350 Be Substituted With AS/NZS 3679.1 300?
AS/NZS 3678 Grade 350 and AS/NZS 3679.1 300 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
Forms & Sizes Available on M-EX
AS/NZS 3678 Grade 350
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3300–4500 mm (129.92–177.17 in)
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)
On M-EX Right Now
AS/NZS 3678 Grade 350
2 active listings and RFQs →
AS/NZS 3679.1 300
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3678 Grade 350 and AS/NZS 3679.1 300?
AS/NZS 3679.1 300 specifies Si which is not specified for AS/NZS 3678 Grade 350.
Can AS/NZS 3678 Grade 350 be substituted with AS/NZS 3679.1 300?
AS/NZS 3678 Grade 350 and AS/NZS 3679.1 300 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.