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GB/T 700 Q235A vs AS/NZS 3678 Grade 450

Strong Match — 94.3% match based on chemical composition and mechanical property overlap.

GB/T 700 Q235A (GB/T 700:2006) and AS/NZS 3678 Grade 450 (AS/NZS 3678:2016) are both steel grades. Both fall under the Structural Steel category. GB/T 700 Q235A is typically used for structural sections, welded structures, general fabrication, machinery frames, steel plates, pipes, while AS/NZS 3678 Grade 450 is commonly used for heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.. GB/T 700 Q235A is defined under Guobiao Standards (GB/T), originating from China, while AS/NZS 3678 Grade 450 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.

As per chemical composition, GB/T 700 Q235A vs AS/NZS 3678 Grade 450 is a 94.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 94.3%.

Frequently Compared With GB/T 700 Q235A:
GOST 19281 09G2S CSA G40.21 400W CSA G40.21 350W ASTM A1008 SS Grade 80 CSA G40.21 480W CSA G40.21 300W AS/NZS 3679.1 350 ASTM A1008 SS Grade 50 CSA G40.21 260W AS/NZS 3679.1 300 CSA G40.21 400A ASTM A283C
Match Breakdown
CHEMISTRY MATCH
94.3%
MECHANICAL MATCH
No shared data
OVERALL
94.3%
Specifications
Property GB/T 700 Q235A AS/NZS 3678 Grade 450
Standard GB/T 700:2006 AS/NZS 3678:2016
Category Structural Steel Structural Steel
C (%) <=0.22 max 0.2
Si (%) <=0.35 max 0.55
Mn (%) <=1.40 max 1.6
P (%) <=0.045 max 0.03
S (%) <=0.050 max 0.03
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property GB/T 700 Q235A AS/NZS 3678 Grade 450
Tensile Strength 370-500 MPa Not specified
Yield Strength >=235 MPa Not specified
Elongation >=26% Not specified
Condition Hot rolled, controlled rolled or normalized; yield up to 16 mm, elongation up to 40 mm (N/mm2 = MPa) Not specified
Typical Applications
GB/T 700 Q235A
structural sections, welded structures, general fabrication, machinery frames, steel plates, pipes
AS/NZS 3678 Grade 450
Heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.
Can GB/T 700 Q235A Be Substituted With AS/NZS 3678 Grade 450?
GB/T 700 Q235A and AS/NZS 3678 Grade 450 overlap closely enough on chemistry and mechanical properties that AS/NZS 3678 Grade 450 is often considered as a substitute for GB/T 700 Q235A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
GB/T 700 Q235A
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2900–3100 mm (114.17–122.05 in)
AS/NZS 3678 Grade 450
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–4200 mm (98.43–165.35 in)
On M-EX Right Now
GB/T 700 Q235A
2 active listings and RFQs →
AS/NZS 3678 Grade 450
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 700 Q235A and AS/NZS 3678 Grade 450?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 700 Q235A be substituted with AS/NZS 3678 Grade 450?
GB/T 700 Q235A and AS/NZS 3678 Grade 450 overlap closely enough on chemistry and mechanical properties that AS/NZS 3678 Grade 450 is often considered as a substitute for GB/T 700 Q235A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.