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:
Jul. 01, 2008
Filed:
Dec. 09, 2005
Kazuhiko Ogawa, Nishinomiya, JP;
Masaaki Igarashi, Sanda, JP;
Hiroyuki Semba, Sanda, JP;
Tomohiko Omura, Kishiwada, JP;
Mitsuo Miyahara, Kobe, JP;
Kazuhiko Ogawa, Nishinomiya, JP;
Masaaki Igarashi, Sanda, JP;
Hiroyuki Semba, Sanda, JP;
Tomohiko Omura, Kishiwada, JP;
Mitsuo Miyahara, Kobe, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Abstract
A weld joint having a base material and a weld metal both of an austenitic steel, wherein the weld metal has a chemical composition, in mass %, that C: 0.04% or less, Si: 1.0% or less, Mn: 3% or less, P: 0.02% or less, S: 0.005% or less, Cr: 15 to 25%, Ni: 30% or more, Mo: 10% or less, Nb: 2.5 to 5%, Al: 3.0% or less, Ti: 0.5% or less, and the balance: Fe and inevitable impurities, the contents of Al and Ti satisfying the following: (Ti+Al)>Nb/8. The weld joint is a high strength austenitic steel weld joint which exhibits excellent toughness at a low temperature and excellent resistance to hydrogen embrittlement, which are required for a piping and a vessel for high pressure hydrogen, particularly also in a welded zone.