Q355 steel is a Chinese low-alloy high-strength structural steel that replaces Q345. The material density is 7.85 g/cm3. According to GB/T 1591-2018, Q355 has 3 quality levels: Q355B, Q355C and Q355D.
Q355 is a kind of steel. It is a kind of low-alloy high-strength structural steel, widely used in bridges, vehicles, ships, buildings, pressure vessels, special equipment, etc., where "Q" means yield strength, 355 means that the yield strength of this steel is 355MPa, and will change with time. As the thickness of the material increases, its yield value decreases.
Q355 steel has good mechanical properties, good weldability, hot and cold processing properties and corrosion resistance. It can be used to manufacture welded structural parts with higher loads such as ships, boilers, pressure vessels, petroleum storage tanks, bridges, power station equipment, lifting and transportation machinery, etc.
