Related Material — 62.6% match
based on chemical composition and mechanical property overlap.
GB/T 700 Q235A (GB/T 700:2006) and CSA G40.21 400A (CSA G40.21-13 (R2023)) 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 CSA G40.21 400A is commonly used for atmospheric corrosion-resistant (weathering) structural steel; exposed bridge girders and structural members where high strength and weathering resistance are both needed.
GB/T 700 Q235A is defined under Guobiao Standards (GB/T), originating from China, while CSA G40.21 400A is defined under Canadian Standards Association (CSA), originating from Canada.
As per chemical composition, GB/T 700 Q235A vs CSA G40.21 400A is a 93.8% match.
As per mechanical properties, the match is 0%.
Combined, this makes them a related material overall at 62.6%.
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
CSA G40.21 400A
Tensile Strength
370-500 MPa
520-670 MPa
Yield Strength
>=235 MPa
400 MPa min
Elongation
>=26%
17% min
Condition
Hot rolled, controlled rolled or normalized; yield up to 16 mm, elongation up to 40 mm (N/mm2 = MPa)
Atmospheric corrosion-resistant (weathering) structural steel; exposed bridge girders and structural members where high strength and weathering resistance are both needed
Key Differences
CSA G40.21 400A specifies Cu which is not specified for GB/T 700 Q235A.
Can GB/T 700 Q235A Be Substituted With CSA G40.21 400A?
GB/T 700 Q235A and CSA G40.21 400A 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 Q235A and CSA G40.21 400A?
CSA G40.21 400A specifies Cu which is not specified for GB/T 700 Q235A.
Can GB/T 700 Q235A be substituted with CSA G40.21 400A?
GB/T 700 Q235A and CSA G40.21 400A 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.