I've talked to you before about the general use of seamless tubes.In the daily use, seamless tube or more common, a lot of careful people may find that sometimes the appearance of seamless tube presents some horizontal lines, do not have any problems, so what is the reason for this?

If the deformation amount of thick wall seamless pipe is small during the cavitation process, additional stress of external pressure and internal tension will occur in the outer and inner surface layer. At this time, due to the difference in deformation and permeability, the extension trend of the outer and outer surface layer is larger than that of the inner layer. Therefore, additional pressure stress occurs in the outer and outer surface layer, while additional pressure stress occurs in the outer and outer surface layer.If the external surface layer of the additional stress is larger, the root stress and additional stress when drawing together, will exceed the strength of the thick wall seamless tube allowable degree, resulting in transverse cracks in the external surface.

Under the corresponding mechanical conditions, various factors that reduce the plasticity of the seamless tube during machining will increase the opportunity for the appearance of internal transverse crack.Therefore, it is very important to annealing quality and eliminate hydrogen embrittlement when producing thick - walled seamless tubes WH-STEEL is a large professional foreign trade firm.The company specializes in the development and production of steel pipe, flange, elbow and other pipe fittings, for the production of quality control, we have very high requirements, to ensure that each batch of overseas goods have good quality.You are welcome to trust WH-STEEL and purchase WH-STEEL products.