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:
Jan. 26, 2016
Filed:
Jul. 26, 2012
Tomoyuki Sukawa, Joetsu, JP;
Shinnya Yamamoto, Wakayama, JP;
Kouichi Takeuchi, Chofu, JP;
Hayato Kita, Joetsu, JP;
Shuuji Yoshida, Joetsu, JP;
Katsuhiko Taketsu, Joetsu, JP;
Masayuki Shibuya, Narashino, JP;
Tomoyuki Sukawa, Joetsu, JP;
Shinnya Yamamoto, Wakayama, JP;
Kouichi Takeuchi, Chofu, JP;
Hayato Kita, Joetsu, JP;
Shuuji Yoshida, Joetsu, JP;
Katsuhiko Taketsu, Joetsu, JP;
Masayuki Shibuya, Narashino, JP;
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
Abstract
A high-Si content austenitic stainless steel, which exhibits stable acid resistance and excellent corrosion resistance in high-temperature and concentrated nitric acid, has a chemical composition comprising: C: at most 0.04%; Si: 2.5-7.0%; Mn: at most 10%; P at most 0.03%; S: at most 0.03%; N: at most 0.035%; sol. Al: at most 0.03%; Cr: 7-20%; Ni: 10-22%; optionally, one or more types selected from Nb, Ti, Ta and Zr: 0.05-0.7% in total; and the remainder being Fe and impurities, wherein a total amount of Btype inclusions measured by a method according to JIS G0555 (2003) Annex 1 'Microscopic Testing for the Non-Metallic Inclusions on the Point Counting Principle' is not more than 0.03% by area %.