Related Material — 63.5% match
based on chemical composition and mechanical property overlap.
GB/T 700 Q235B (GB/T 700:2006) and CSA G40.21 400W (CSA G40.21-13 (R2023)) are both steel grades.
Both fall under the Structural Steel category.
GB/T 700 Q235B is typically used for structural steelwork, fabricated components, machinery parts, storage tanks, pipes, while CSA G40.21 400W is commonly used for heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment..
GB/T 700 Q235B is defined under Guobiao Standards (GB/T), originating from China, while CSA G40.21 400W is defined under Canadian Standards Association (CSA), originating from Canada.
As per chemical composition, GB/T 700 Q235B vs CSA G40.21 400W is a 95.2% match.
As per mechanical properties, the match is 0%.
Combined, this makes them a related material overall at 63.5%.
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 Q235B
CSA G40.21 400W
Tensile Strength
370-500 MPa
520-690 MPa
Yield Strength
>=235 MPa
400 MPa min
Elongation
>=26%
Not specified
Condition
Hot rolled, controlled rolled or normalized; yield up to 16 mm, elongation up to 40 mm (N/mm2 = MPa)
Can GB/T 700 Q235B Be Substituted With CSA G40.21 400W?
GB/T 700 Q235B and CSA G40.21 400W 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 Q235B and CSA G40.21 400W?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 700 Q235B be substituted with CSA G40.21 400W?
GB/T 700 Q235B and CSA G40.21 400W 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.