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GB/T 700 Q275B vs AS/NZS 3678 Grade 450

Strong Match — 95.3% match based on chemical composition and mechanical property overlap.

GB/T 700 Q275B (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 Q275B is typically used for hot rolled structural sheets, strips, sections and bars for welding, riveting and bolting engineering, 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 Q275B 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 Q275B vs AS/NZS 3678 Grade 450 is a 95.3% 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 95.3%.

Frequently Compared With GB/T 700 Q275B:
AS/NZS 3679.1 300 CSA G40.21 300W AS/NZS 3679.1 350 CSA G40.21 400A CSA G40.21 480W ASTM A1008 SS Grade 50 ASTM A572 Gr.65 GOST 19281 09G2S CSA G40.21 260W CSA G40.21 350W CSA G40.21 400W ASTM A1008 SS Grade 80
Match Breakdown
CHEMISTRY MATCH
95.3%
MECHANICAL MATCH
No shared data
OVERALL
95.3%
Specifications
Property GB/T 700 Q275B AS/NZS 3678 Grade 450
Standard GB/T 700:2006 AS/NZS 3678:2016
Category Structural Steel Structural Steel
C (%) <=0.21 max 0.2
Si (%) <=0.35 max 0.55
Mn (%) <=1.50 max 1.6
P (%) <=0.045 max 0.03
S (%) <=0.045 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 Q275B AS/NZS 3678 Grade 450
Tensile Strength 410-540 MPa Not specified
Yield Strength >=275 MPa Not specified
Elongation >=22% 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 Q275B
Hot rolled structural sheets, strips, sections and bars for welding, riveting and bolting engineering
AS/NZS 3678 Grade 450
Heavy cranes, offshore platforms, pressure vessels, structural members in high-rise construction, mining equipment.
Can GB/T 700 Q275B Be Substituted With AS/NZS 3678 Grade 450?
GB/T 700 Q275B 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 Q275B 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 Q275B
No active listings currently.
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 Q275B
0 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 Q275B 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 Q275B be substituted with AS/NZS 3678 Grade 450?
GB/T 700 Q275B 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 Q275B in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.