Q355 Material
Q355 is a kind of steel material. It is a low alloy steel(<0.2%), widely used in buildings, Bridges, vehicles, ships, pressure vessels, etc. Q is the yield strength of this material, and 355 is the yield value of this material, which is about 355 MPa. The yield value decreases with the increase of the thickness of the material.
Q355 good comprehensive mechanical properties, low temperature performance, plasticity and good weldability, used in low pressure vessel, oil tank, vehicles, cranes, mining machinery, power stations, Bridges under dynamic load of the structure, mechanical parts, such as building structure, the general metal structure, hot rolled or normalizing state, can be used to to 40 ℃ in cold region under various structure level classification Q355 rank can be divided into Q355A, Q355B, Q355C, Q355D, Q355E.
The differences between us is the temperature of impact.
Q355A, is not to do impact;
Q355B, is 20℃degrees of normal temperature impact;
Q355C, is 0℃ degree impact;
Q355D, is -20℃ degree impact;
Q355E, it’s -40℃ degree impact.
At different impact temperature, the impact value is also different.
Q355A : C≤0.20，Mn≤1.7，Si≤0.55，P≤0.045，S≤0.045，V 0.02-0.15;
Q355B: C≤0.20，Mn≤1.7，Si≤0.55，P≤0.040，S≤0.040, V 0.02-0.15;
Q355C: C≤0.20，Mn≤1.7，Si≤0.55， P≤0.035， S≤0.035，V 0.02-0.15, Al≥0.015；
Q355D: C≤0.20，Mn≤1.7，Si≤0.55，P≤0.030，S≤0.030， V 0.02-0.15 , Al≥0.015;
Q355E: C≤0.20， Mn ≤1.7， Si≤0.55， P≤0.025， S≤0.025，V 0.02-0.15, Al≥0.015。
