Strong Match — 99.3% match
based on chemical composition and mechanical property overlap.
GB/T 700 Q235B (GB/T 700:2006) and GB/T 700 Q235A (GB/T 700:2006) 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 GB/T 700 Q235A is commonly used for structural sections, welded structures, general fabrication, machinery frames, steel plates, pipes.
GB/T 700 Q235B is defined under Guobiao Standards (GB/T), originating from China, while GB/T 700 Q235A is defined under Guobiao Standards (GB/T), originating from China.
As per chemical composition, GB/T 700 Q235B vs GB/T 700 Q235A is a 98.9% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a strong match overall at 99.3%.
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
GB/T 700 Q235A
Tensile Strength
370-500 MPa
370-500 MPa
Yield Strength
>=235 MPa
>=235 MPa
Elongation
>=26%
>=26%
Condition
Hot rolled, controlled rolled or normalized; yield up to 16 mm, elongation up to 40 mm (N/mm2 = MPa)
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 GB/T 700 Q235A?
GB/T 700 Q235B and GB/T 700 Q235A overlap closely enough on chemistry and mechanical properties that GB/T 700 Q235A is often considered as a substitute for GB/T 700 Q235B in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between GB/T 700 Q235B and GB/T 700 Q235A?
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 GB/T 700 Q235A?
GB/T 700 Q235B and GB/T 700 Q235A overlap closely enough on chemistry and mechanical properties that GB/T 700 Q235A is often considered as a substitute for GB/T 700 Q235B in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.