Helmet for Manufacturing a tubular seamless steel tube of austenitic Stainless Steel, production method thereof and production process of a tube through the Helmet

摘要

Hull penetrated austenitic stainless steel with good condition of inner Surface, establishing a medium which can carry out mass production on an industrial scale of Seamless Steel Pipe of good quality Stainless Steel billet and its concentration P how 0.040% and a maximum concentration of s how Max 0.020% that is perforated under conditions in which the ratio of expansion Tube (Outer diameter H Hull / Diameter of the billet to be worked) satisfies the following Equation to obtain a Helmet of austenitic Stainless Steel (%) / {P (H - 0.02 0.025 X} {s + 2) (%) 0.015 x h - 2} 0.01) Equal to 1 for Manufacturing a seamless steel tube of austenitic Stainless Steel,The Helmet is rolled to form the tube.