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AS/NZS 3678 Grade 400 vs AS/NZS 3679.1 300

Related Material — 64.6% match based on chemical composition and mechanical property overlap.

AS/NZS 3678 Grade 400 (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 400 is typically used for heavy structural fabrication, crane booms, mining machinery, earthmoving equipment, structural columns., while AS/NZS 3679.1 300 is commonly used for hot-rolled structural bars and sections for general structural framing. AS/NZS 3678 Grade 400 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 400 vs AS/NZS 3679.1 300 is a 96.9% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 64.6%.

Frequently Compared With AS/NZS 3678 Grade 400:
AS/NZS 1595 C450 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 ASTM A572 Gr.65 CSA G40.21 400A ASTM A572 Grade 50
Match Breakdown
CHEMISTRY MATCH
96.9%
MECHANICAL MATCH
0%
OVERALL
64.6%
Specifications
Property AS/NZS 3678 Grade 400 AS/NZS 3679.1 300
Standard AS/NZS 3678:2016 AS/NZS 3679.1:2016
Category Structural Steel Structural Steel
C (%) max 0.2 <=0.22
Mn (%) max 1.6 <=1.70
Si (%) max 0.55 <=0.50
P (%) max 0.03 <=0.040
S (%) max 0.03 <=0.040
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 AS/NZS 3679.1 300
Yield Strength 400 MPa min (t<=12mm) 300 MPa min
Tensile Strength ~520 MPa min (approx, equivalent to ASTM A572 Gr.60) 440-600 MPa
Elongation Not specified 22% min
Typical Applications
AS/NZS 3678 Grade 400
Heavy structural fabrication, crane booms, mining machinery, earthmoving equipment, structural columns.
AS/NZS 3679.1 300
Hot-rolled structural bars and sections for general structural framing
Can AS/NZS 3678 Grade 400 Be Substituted With AS/NZS 3679.1 300?
AS/NZS 3678 Grade 400 and AS/NZS 3679.1 300 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)
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 400
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 400 and AS/NZS 3679.1 300?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can AS/NZS 3678 Grade 400 be substituted with AS/NZS 3679.1 300?
AS/NZS 3678 Grade 400 and AS/NZS 3679.1 300 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.