US Patent Issued to NIPPON STEEL on Nov. 3 for "Austenitic heat resistant steel" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,326, issued on Nov. 3, was assigned to NIPPON STEEL Corp. (Tokyo).

"Austenitic heat resistant steel" was invented by Masahiro Seto (Tokyo), Hiroyuki Hirata (Tokyo), Mitsuru Yoshizawa (Tokyo), Junichi Higuchi (Tokyo) and Takahiro Osuki (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided an austenitic heat resistant steel including a chemical composition that consists of, in mass %, C: 0.04 to 0.12%, Si: 0.01 to 0.30%, Mn: 0.50 to 1.50%, P: 0.001 to 0.040%, S: less than 0.0050%, Cu: 2.2 to 3.8%, Ni: 8.0 to 11.0%, Cr: 17.7 to 19.3%, Mo: 0.01 to 0.55%, Nb: 0.400 to 0.650%, B: 0.0010 to 0.0060%, N: 0.050 to 0.160%, Al: 0.025% or less, ...