ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,879, issued on April 21, was assigned to JFE Steel Corp. (Tokyo).
"Alloy pipe and method for producing same" was invented by Shunsuke Sasaki (Tokyo), Masao Yuga (Tokyo), Tatsuro Katsumura (Tokyo) and Hideo Kijima (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An alloy pipe and a method for producing the same are disclosed. The alloy pipe of the present invention contains, as a component composition, in terms of % by mass, Cr: 11.5-35.0%, Ni: 23.0-60.0%, and Mo: 0.5-17.0%, has an austenitic phase as a microstructure, has a Mo concentration (% by mass) in a grain boundary of the austenitic phase that is 4.0 times or less than a Mo concentratio...