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, 2020
Filed:
Feb. 20, 2015
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Kana Jotoku, Amagasaki, JP;
Hiroyuki Hirata, Neyagawa, JP;
Tomohiko Omura, Kishiwada, JP;
Jun Nakamura, Nishinomiya, JP;
Takahiro Osuki, Takarazuka, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
A welded joint having high strength and good hydrogen embrittlement resistance is provided. A welded joint is a welded joint obtained by welding a base material using a welding material. The base material has a chemical composition of, in mass %: C: 0.005 to 0.1%; Si: up to 1.2%; Mn: 2.5 to 6.5%; Ni: 8 to 15%; Cr: 19 to 25%; Mo: 0.01 to 4.5%; V: 0.01 to 0.5%; Nb: 0.01 to 0.5% Al: less than 0.05%; N: 0.15 to 0.45%; O: up to 0.02%; P: up to 0.05%; and S: up to 0.04%, and a balance being iron and impurities, and which satisfies Equation (1). The welding material has a chemical composition which satisfies Equations (1) and (2).Ni+0.65Cr+0.98Mo+1.05Mn+0.35Si+12.6C≥29  (1)0.31C+0.048Si−0.02Mn−0.056Cr+0.007Ni−0.013Mo≤−1.0  (2)