US Patent Issued to JFE Steel on June 17 for "Stainless steel pipe and method for manufacturing same" (Japanese Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,371, issued on June 17, was assigned to JFE Steel Corp. (Tokyo).

"Stainless steel pipe and method for manufacturing 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: "A stainless steel pipe of a predetermined composition is provided that comprises N, Ti, Al, V, and Nb so as to satisfy the predetermined formula, the stainless steel pipe having an axial tensile yield strength of 757 MPa or more, an axial compressive yield strength/axial tensile yield strength ratio of 0.85 to 1.15, and a microstructure that is 20 to 80% ferrite phase by vol...