Shandong Q345 seamless steel pipe knowledge from Shandong Seamless Steel Tube Factory
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Q345 seamless steel pipe is a kind of steel pipe material. Q stands for the yield of this material. The 345 behind it refers to the yield value of this material, which is around 345. And as the thickness of the material increases its yield value decreases.
Similar to the Q235 naming method.
Q345A, Q345B, Q345C, Q345D, Q345E. This is the distinction of grades, which represents the difference between the temperature of the impact and the difference!
Q345A class is not to make impact; Q345B class is 20 degree normal temperature impact; Q345C class is 0 degree impact; Q345D class is -20 degree impact; Q345E class is -40 degree impact. At different impact temperatures, the impact value is also different.
In the plate, it is a low alloy series. In low alloy materials, this material is the most common. The former name of Q345 seamless steel pipe is: 16Mn seamless steel pipe.
External implementation standard of Q345 seamless steel pipe is: GB709, internal implementation standard is: GB/T1591-94
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