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. 02, 2001
Filed:
Nov. 01, 1999
Junichiro Hirasawa, Chiba, JP;
Atsushi Miyazaki, Chiba, JP;
Kazuhide Ishii, Chiba, JP;
Susumu Satoh, Chiba, JP;
Haruhiko Ishizuka, Chiba, JP;
Kawasaki Steel Corporation, Hyogo, JP;
Abstract
A highly corrosion resistant chromium-containing steel has corrosion resistance and oxidation resistance comparable or superior to those of low Cr-stainless steel (Cr content: 11-13% by weight), and excellent intergranular corrosion resistance not attainable in existing chromium containing steels. However, the steel has such a low Cr content that it is not classified as a stainless steel. A preferred composition on a weight % basis, is: C: 0.015% or less, Si: from more than 1.0% to 2.0%, Mn: 0.5% or less, P: 0.05% or less, S: 0.01 or less, Ni: 0.015% or less, provided that sum of the C content and the N content (C+N): 0.020% or less. Ti: from more than 0.30% to 0.50% in which the contents for Cr, Ti, C and N, that is, [Cr], [Ti], [C] and [N] satisfying the following relation: [Ti]/([C]+[N])≧64−4×[Cr], balance of Fe and incidental impurities.