DIN 17175 St45.8 Carbon Steel Pipe

Hot rolled steel pipe Hot rolling is relative to cold rolling. Cold rolling is rolling below the crystallization temperature, while hot rolling is rolling above the recrystallization temperature. Advantages of hot rolling It can destroy the casting structure of ingot, refine the grain of steel, and eliminate the defects of microstructure, so that the steel structure is dense and the mechanical properties are improved. This improvement is mainly along the rolling direction, so that the steel is no longer isotropic to a certain extent; Bubbles, cracks and porosity formed during pouring can also be welded under high temperature and pressure. Hot rolled steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes. The application of hot-rolled seamless steel pipe:…