The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2025
Filed:
May. 29, 2020
Nippon Steel Corporation, Tokyo, JP;
Misaho Yamamura, Tokyo, JP;
Jun Nakamura, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
In the austenitic stainless steel material of the present disclosure, the chemical composition consists of, by mass %, C: 0.100% or less, Si: 1.00% or less, Mn: 5.00% or less, Cr: 15.00 to 22.00%, Ni: 10.00 to 21.00%, Mo: 1.20 to 4.50%, P: 0.050% or less, S: 0.050% or less, Al: 0.100% or less, N: 0.100% or less, and Cu: 0 to 0.70%, with the balance being Fe and impurities, and an austenite grain size No. determined in accordance with ASTM E112 is from 5.0 to less than 8.0, and in a cross section perpendicular to the longitudinal direction of the austenitic stainless steel material, the dislocation cell structure ratio is from 50 to less than 80%, and the number density of precipitates with a long axis of 1.0 μm or more is 5.0 per 0.2 mmor less.