235 common carbon structural steel is also called A3 steel.
Common carbon structural steel plate is a kind of steel material.
Q stands for the yield limit of this material. The latter 235 is the yield value of this material, which is about 235 MPa. The yield value decreases with the increase of material thickness. Due to moderate carbon content, better comprehensive properties, better combination of strength, plasticity and welding properties, it is widely used.
Carbon-through structural steel-plain plate is a kind of steel material.
Q stands for the yield limit of this material. The latter 235 is the yield value of this material, which is about 235 MPa. The yield value decreases with the increase of material thickness (thickness/diameter less than 16 mm, yield strength 235 MPa; 16m).