Q345E steel pipe belongs to the steel grade in GB/T 6479-2013 "Seamless steel pipe for high-pressure fertilizer equipment". It is based on 16Mn series alloy steel added with some trace elements such as vanadium, titanium and niobium to refine the grain, and strictly Control P and S elements to improve low-temperature impact toughness and reduce cracking tendency. The supply state of Q345E steel pipe is normalized, and the organization is banded ferrite and pearlite.
Q345E steel pipe is based on Mn as the main element, and its brittleness transition temperature is about -40℃. As a ferritic low-temperature steel, it can be used as a variety of structural materials at room temperature and above -40℃. However, in actual production , Q345E steel pipe is rarely used in low temperature below -40℃. Q345E steel pipe can be used as an oil and gas pipeline in Siberia.