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

Close Alternative — 73% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 350 (AS/NZS 3678:2016) and AS/NZS 3679.1 350 (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 3679.1 350 is commonly used for hot-rolled structural bars and sections for primary structural beams, columns, and framing. AS/NZS 3678 Grade 350 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand, while AS/NZS 3679.1 350 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 3679.1 350 is a 94.9% match. As per mechanical properties, the match is 29.2%. Combined, this makes them a close alternative overall at 73%.

Frequently Compared With AS/NZS 3678 Grade 350:
CSA G40.21 260W CSA G40.21 300W AS/NZS 3679.1 300 CSA G40.21 350W CSA G40.21 400A CSA G40.21 480W GOST 19281 09G2S CSA G40.21 400W ASTM A572 Gr.65 ASTM A1008 SS Grade 80 ASTM A1008 SS Grade 50 ASTM A283C
Match Breakdown
CHEMISTRY MATCH
94.9%
MECHANICAL MATCH
29.2%
OVERALL
73%
Specifications
Property AS/NZS 3678 Grade 350 AS/NZS 3679.1 350
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 3679.1 350
Tensile Strength 480-620 MPa 480-640 MPa
Yield Strength 360 MPa min 350 MPa min
Elongation 18-22 % 20% min
Typical Applications
AS/NZS 3678 Grade 350
bridges,heavy structures,mining equipment,cranes,offshore platforms,pressure vessels,structural components
AS/NZS 3679.1 350
Hot-rolled structural bars and sections for primary structural beams, columns, and framing
Key Differences
Can AS/NZS 3678 Grade 350 Be Substituted With AS/NZS 3679.1 350?
AS/NZS 3678 Grade 350 and AS/NZS 3679.1 350 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 3679.1 350
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2900–3200 mm (114.17–125.98 in)
On M-EX Right Now
AS/NZS 3678 Grade 350
2 active listings and RFQs →
AS/NZS 3679.1 350
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AS/NZS 3678 Grade 350 and AS/NZS 3679.1 350?
AS/NZS 3679.1 350 specifies Si which is not specified for AS/NZS 3678 Grade 350.
Can AS/NZS 3678 Grade 350 be substituted with AS/NZS 3679.1 350?
AS/NZS 3678 Grade 350 and AS/NZS 3679.1 350 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.