Close Alternative — 83.8% match
based on chemical composition and mechanical property overlap.
GB/T 700 Q275C (GB/T 700:2006) and AS/NZS 3678 Grade 300 (AS/NZS 3678:2016) are both steel grades.
Both fall under the Structural Steel category.
GB/T 700 Q275C is typically used for hot rolled structural sheets, strips, sections and bars for welding, riveting and bolting engineering, while AS/NZS 3678 Grade 300 is commonly used for general fabrication, structural members, high-rise buildings, bridges, storage tanks.
GB/T 700 Q275C is defined under Guobiao Standards (GB/T), originating from China, while AS/NZS 3678 Grade 300 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.
As per chemical composition, GB/T 700 Q275C vs AS/NZS 3678 Grade 300 is a 96.8% match.
As per mechanical properties, the match is 57.8%.
Combined, this makes them a close alternative overall at 83.8%.
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 Q275C
AS/NZS 3678 Grade 300
Tensile Strength
410-540 MPa
430-560 MPa
Yield Strength
>=275 MPa
300 MPa min
Elongation
>=22%
22% min
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 Q275C
Hot rolled structural sheets, strips, sections and bars for welding, riveting and bolting engineering
AS/NZS 3678 Grade 300
General fabrication, structural members, high-rise buildings, bridges, storage tanks
Can GB/T 700 Q275C Be Substituted With AS/NZS 3678 Grade 300?
GB/T 700 Q275C and AS/NZS 3678 Grade 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.
What is the difference between GB/T 700 Q275C and AS/NZS 3678 Grade 300?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 700 Q275C be substituted with AS/NZS 3678 Grade 300?
GB/T 700 Q275C and AS/NZS 3678 Grade 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.