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. 28, 2017
Filed:
Feb. 10, 2012
Hiroyuki Nagayama, Tokyo, JP;
Kenta Yamada, Tokyo, JP;
Masahiko Hamada, Tokyo, JP;
Daisuke Motoya, Tokyo, JP;
Hisashi Amaya, Tokyo, JP;
Hiroyuki Nagayama, Tokyo, JP;
Kenta Yamada, Tokyo, JP;
Masahiko Hamada, Tokyo, JP;
Daisuke Motoya, Tokyo, JP;
Hisashi Amaya, Tokyo, JP;
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
Abstract
A welded joint of duplex stainless steel, which can suppress precipitation σ phase under high heat input welding, is excellent in SCC resistance under high-temperature chloride environments. A weld metal of the welded joint contains, in mass percent, C: at most 0.030%, Si: 0.20 to 1.00%, Mn: at most 8.00%, P: at most 0.040%, S: at most 0.0100%, Cu: at most 2.00%, Ni: 7.00 to 12.00%, Cr: 20.0 to 30.0%, Mo: 1 to 4%, N: 0.100 to 0.350%, sol. Al: at most 0.040%, and O: at most 0.035%, the balance being Fe and impurities. The weld metal satisfies Expressions (1) and (3):2.2Cr+7Mo+3Cu>66  (1)Cr+11Mo+10Ni−12(Cu+30N)<100  (3)where a content (mass percent) of each element in one of the base metal and weld metal is used for each element in Expressions (1) and (3).