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Influence of raw material on welding quality of steel pipe
May 31, 2017

Influence of raw material on welding quality of steel pipe

 

Steel scrap causal analysis showed that the factors affecting the quality of raw materials are the main surface defects and geometric dimension deviation of strip unstable mechanical properties of steel strip, etc. three aspects, therefore, from the three aspects of key control.   

The mechanical properties of steel on steel pipe quality

Welded steel pipe commonly used for carbon steel structure, the main brands are Q195, Q215, Q235 three.

 

 steel pipe

 

Because of the high yield and tensile strength of the steel strip, the forming of the steel band is difficult. Especially when the pipe wall is thicker, the material's resilience is large, and the steel pipe has a great deformation stress during welding, and the weld seam is prone to crack. When the tensile strength of the steel band exceeds 635MPa and the elongation is less than 10%, the welding seam of the steel band is easy to crack when it is welded.

 steel pipe

 

When the tensile strength is lower than 300MPa, the strip in the molding process because the material is soft, easy to wrinkle the surface, especially in the welding pipe diameter of more than 60mm, the circle wrinkles are obvious and regularity, the surface of the steel pipe, steel pipe will cause serious wrinkles, the entire batch of scrap. It is obvious that the mechanical properties of the material affect the quality of the steel tube greatly, and the quality of the steel pipe can be effectively controlled by the strength of the material.

  Suzhou Tianyuan Equipment Technology Co.,Ltdis specialized in researching and manufacturing Precision High Frequency Welded tube production line , roll forming production line , elevator guider production line and SS ARC tube production line etc.