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. 06, 2010
Filed:
Apr. 18, 2005
Masaaki Igarashi, Sanda, JP;
Hiroyuki Semba, Sanda, JP;
Mitsuo Miyahara, Kobe, JP;
Kazuhiro Ogawa, Nishinomiya, JP;
Tomohiko Omura, Kishiwada, JP;
Masaaki Igarashi, Sanda, JP;
Hiroyuki Semba, Sanda, JP;
Mitsuo Miyahara, Kobe, JP;
Kazuhiro Ogawa, Nishinomiya, JP;
Tomohiko Omura, Kishiwada, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Abstract
A high-strength stainless steel, having good mechanical properties and corrosion resistance in a high-pressure hydrogen gas environment, is used as a container or other device for high-pressure hydrogen gas, and consists of, by mass %, C: not more than 0.04%, Si: not more than 1.0%, Mn: 7 to 30%, Cr: 15 to 22%, Ni: 5 to 20%, V: 0.001 to 1.0%, N: 0.20 to 0.50% and Al: not more than 0.10%, and the balance Fe and impurities. Among the impurities, P is not more than 0.030%, S is not more than 0.005%, and Ti, Zr and Hf are not more than 0.01% respectively, and the contents of Cr, Mn and N satisfy the relationship, 2.5Cr+3.4Mn≦300N. The weld metal of the welded joint of the container or other device made of the said stainless steel satisfies the relationship, −11≦Nieq−1.1×Creq≦−8.