Q345B seamless steel pipe

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Analysis on scare defects of Q345B seamless steel pipe 


Q345B seamless steel pipe belongs to low alloy high strength structural steel. One method of exiting is 16Mn seamless steel pipe. Before delivery, visible cracks, folding, scarring, rolling and delamination are not allowed on the inner and outer surfaces of the Q345B seamless steel pipe.


The scarring defect of the outer wall of Q345B seamless steel pipe is actually a typical outer surface folding defect, which is formed by the existence of microcracks on the Q345B seamless steel pipe surface of the billet, which are oxidized at high temperature around the cracks after heating in the heating furnace and further expanded in the subsequent rolling process.

The abnormal martensitic structure on the near Q345B seamless steel pipe surface of a folded crack on the outer surface is caused by a sharp cooling caused by stagnant water at the crack.

Katalor analysis on scare defects of Q345B seamless steel pipe, so that you should pay a attention to choose the Q345B seamless steel pipe. You can contact us directly if you have any need in Q345B seamless steel pipe, we will reply you as soon as possible.

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