Q345D seamless pipe is a kind of seamless pipe in low-alloy high-strength structural steel. It is named low-alloy because the steel contains a small amount of alloy elements.
Q345D seamless pipes are mainly used for construction and engineering structures, and the carbon content is less than or equal to 0.18%. The effect of alloying elements makes the yield strength of Q345D seamless pipes 25% higher than that of carbon structural steel pipes with the same carbon content- 150%. Therefore, during use, the Q345D seamless pipe can reduce the self-weight of the steel structure, save steel products and effectively extend the service life of the steel structure.
Among them, the name of Q345D is named after its yield strength and impact temperature. Q stands for yield strength, that is, the yield strength is 345mpa, and D stands for impact temperature of minus 20 degrees Celsius.
In addition, Q345D seamless pipe has good toughness and weldability, and has certain corrosion resistance and low temperature resistance. Q345D seamless pipes are also widely used, mainly in welded structures, such as bridges, vehicles, ships, pipelines, boilers, large containers and so on.
