Both Q235A steel plates and Q235B steel plates belong to carbon steel or mild steel.
According to standard GB/T 700,the distinction of Q235A steel and Q235B material mainly lies in carbon content. The carbon content of Q235A steel plates is 0.14-0.22. Q235A material does not need impact test. While Q235B steel need to do normal temperature impact test, V notch. Under consultation with the client, the carbon content of Q235B material can also be less than or equal to 0.22%.
In contrast, the mechanical properties of the steel Q235B are far superior to that of the material Q235A. In general, the steel works are marked on the logo before the finished Q235 steel plates are out of the factory. The user can identify the material on the label as Q235A steel plates, or Q235B steel plates, or other material.
GB/T 700 Q235A steel plates have good ductility and plasticity, have a certain elongation, and have good welding performance and heat processing property. Q235A steel plates are generally used in hot rolling state.
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