What are the advantages and disadvantages of hot-rolled seamless steel pipe? Seamless steel hot-rolled, grain refinement of steel, steel ingot casting destroy tissue and eliminate defects in the microstructure, the resulting steel organization compacting, mechanical properties improved. before the existence of the bubble pipe, cracks and loose, after hot rolling at high temperature and pressure will be welded together.
 
Although hot-rolled seamless steel pipe has many advantages, but its shortcomings must be clear, after the hot-rolled steel, steel and non-metallic inclusions inside is pressed into thin slices, stratification. Stratification between the steel in the thickness direction of tension performance deteriorated significantly, there interlayer tear weld shrinkage.
 
Hot-rolled steel into too, must have advanced technology, if technology does not pass, steel uneven residual stress caused by cooling during hot rolling. Residual stress in the absence of external forces are balanced inside, but in the case of steel external forces under are affected to some degree, for example, will have some impact in terms of deformation, stability, resistance to fatigue.
 
 When the steel after hot rolling, edge width and thickness control is not good in this regard due to thermal expansion and contraction principle, the beginning of hot-rolled steel, length, thickness are standard, but in the end there will be some errors during the cooling, for edge width wider steel thickness thicker then a negative difference will be more obvious.