What is the Q345qC steel?

Standard: GB / T 714-2008
Main grades: Q345qC, Q345qD, Q345qE

Q: The first letter of Chinese spelling of the word "Qufu" for steel yield strength of bridges; 345: The minimum value of the yield strength in MPa; q: The first letter of Chinese spelling of the word "bridge" of steel for bridges; : Quality level is C, D, E level. Q345qC impact temperature is 0 degrees, Q345qD impact temperature is -20 degrees, Q345qE impact temperature is -40 degrees.
Q345qC steel is structural steel for bridges. It is required to have high strength, toughness and withstand the load and impact of locomotives and vehicles, and have good fatigue resistance, certain low temperature toughness and atmospheric corrosion resistance. The steel for bolted bridges should also have good welding performance and low notch sensitivity.
Delivery status: hot-rolled, normalized (defect detection, Z-direction performance may be required)