US Patent Issued to JFE Steel on Oct. 20 for "High-strength stainless seamless steel pipe for oil wells and method for producing the same" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,768,475, issued on Oct. 20, was assigned to JFE Steel Corp. (Tokyo).

"High-strength stainless seamless steel pipe for oil wells and method for producing the same" was invented by Kenichiro Eguchi (Tokyo) and Shinsuke Ide (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a high-strength stainless seamless steel pipe for oil wells and a method for producing the same. The steel pipe has a chemical composition containing, by mass, C: 0.002% to 0.05%, Si: 0.05% to 0.50%, Mn: 0.04% to 1.80%, P: 0.030% or less, S: 0.0020% or less, Cr: more than 14.0% and 17.0% or less, Ni: 4.0% to 8.0%, Mo: 1.5% to 3.0%, Al: 0.005% to 0.10%, V: 0.005% to 0.20%...