DIN 17172 STE415.7 seamless steel pipe has made outstanding contributions in life, agriculture and heavy industry. DIN 17172 STE415.7 seamless steel pipe has good bearing capacity, and can be used as the main body of large buildings, bridges and sea crossing bridges. DIN 17172 STE415.7 seamless steel pipe is often used to transport water, the main oil pipeline, DIN 17172 STE415.7 seamless steel pipe has good sealing.
DIN 17172 STE415.7 seamless steel pipe is no longer subject to special heat treatment after hot rolling or forging, and is delivered directly after cooling, which is called hot rolling or hot forging state. The end temperature of hot rolling (forging) is generally 800 ~ 900℃, and then it is naturally cooled in air, so hot rolling (forging) state is equivalent to normalizing treatment.
The difference is that the end temperature of hot rolling (forging) varies from high to low, which is not strictly controlled as normalizing heating temperature. Therefore, the fluctuation of microstructure and properties of DIN 17172 STE415.7 seamless steel pipe is greater than normalizing.
