(1) After the hot-rolled pipe is hot-rolled, the non-metallic impurities in the steel will be pressed into thin slices, and then the phenomenon of delamination will occur. The delamination will cause the tensile performance to be reduced in the thickness direction just now, and there may be tears between the layers when the weld is shrinking.
(2) Hot rolled steel products are difficult to control in terms of thickness and edge width.
3.The advantages of cold drawn tube
(1) The outer diameter of the pipe is smaller.
(2) The pipe has high precision and can be produced in small batches.
(3) The cold drawn product has high precision and good surface quality.
(4) The cross-sectional area of steel pipes is more complicated.
(5) Steel pipe has better performance and denser metal.
