What is the difference between Q235A steel and Q235B steel?
Secondly, in the tensile and impact experiments, the material is Q235A steel, no impact test, the material is Q235B steel to do the normal temperature impact test, V notch. Relatively speaking, the mechanical properties of materials Q235B steel is much better than the material of Q235A steel.
Materials Q235A and Q235B belong to carbon structural steel. In the national standard GB700-88, the distinction between Q235A and Q235B material mainly in the carbon content of steel, the material is Q235A of steel, carbon content between 0.14-0.22%, Q235B of carbon content of steel between 0.12-0.20%;
Generally, the steel plate is made on the surface of the steel plate before the finished steel plate leaves the factory. If the profiles, such as: angle steel, channel steel, I-beam, H steel and other steel products, steel products in the finished section before leaving the factory on the signs marked. The user can identify whether the material is Q235A, or Q235B, or other material.
