Related Material — 67.1% match
based on chemical composition and mechanical property overlap.
GB/T 700 Q275C (GB/T 700:2006) and CSA G40.21 350W (CSA G40.21-13 (R2023)) 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 CSA G40.21 350W is commonly used for used in buildings, bridges, cranes, transmission towers, heavy equipment, and structural fabrications..
GB/T 700 Q275C is defined under Guobiao Standards (GB/T), originating from China, while CSA G40.21 350W is defined under Canadian Standards Association (CSA), originating from Canada.
As per chemical composition, GB/T 700 Q275C vs CSA G40.21 350W is a 93.5% match.
As per mechanical properties, the match is 14.3%.
Combined, this makes them a related material overall at 67.1%.
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
CSA G40.21 350W
Tensile Strength
410-540 MPa
450-620 MPa
Yield Strength
>=275 MPa
350 MPa min
Elongation
>=22%
20% min
Condition
Hot rolled, controlled rolled or normalized; yield up to 16 mm, elongation up to 40 mm (N/mm2 = MPa)
Not specified
Hardness
Not specified
135-180 HB
Typical Applications
GB/T 700 Q275C
Hot rolled structural sheets, strips, sections and bars for welding, riveting and bolting engineering
CSA G40.21 350W
Used in buildings, bridges, cranes, transmission towers, heavy equipment, and structural fabrications.
Can GB/T 700 Q275C Be Substituted With CSA G40.21 350W?
GB/T 700 Q275C and CSA G40.21 350W 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.
What is the difference between GB/T 700 Q275C and CSA G40.21 350W?
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 CSA G40.21 350W?
GB/T 700 Q275C and CSA G40.21 350W 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.