Invention Grant
- Patent Title: Ferritic stainless steel plate which has excellent ridging resistance and method of production of same
-
Application No.: US14126083Application Date: 2012-06-18
-
Publication No.: US09771640B2Publication Date: 2017-09-26
- Inventor: Masaharu Hatano , Eiichiro Ishimaru , Akihiko Takahashi , Ken Kimura , Shinichi Teraoka
- Applicant: Masaharu Hatano , Eiichiro Ishimaru , Akihiko Takahashi , Ken Kimura , Shinichi Teraoka
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
- Current Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2011-134224 20110616; JP2011-134416 20110616; JP2011-172168 20110805; JP2012-135082 20120614
- International Application: PCT/JP2012/065507 WO 20120618
- International Announcement: WO2012/173272 WO 20121220
- Main IPC: C22C38/04
- IPC: C22C38/04 ; C22C38/54 ; C21D6/00 ; C21D8/02 ; C22C38/00 ; C22C38/02 ; C22C38/06 ; C22C38/18 ; C22C38/20 ; C22C38/22 ; C22C38/26 ; C22C38/28 ; C22C38/32 ; C22C38/40 ; B21B1/38 ; C22C38/24 ; C22C38/30 ; C22C38/38 ; C22C38/42 ; C22C38/44 ; C22C38/46 ; C22C38/50

Abstract:
A ferritic stainless steel sheet having ridging resistance contains, by mass, 0.025 to 0.30% C, 0.01 to 1.00% Si, 0.01 to 2.00% Mn, 0.050% or less P, 0.020% or less S, 11.0 to 22.0% Cr, and 0.022 to 0.10% N. In addition, Ap, which is defined as 420C+470N+23Ni+9Cu+7Mn−11.5(Cr+Si)−12Mo−52Al−47Nb−49Ti+189 wherein each of Sn, C, N, Ni, Cu, Mn, Cr, Si, Mo, Al, Nb, and Ti denotes the content of the element, satisfies 10≦Ap≦70. Furthermore, a content of Sn satisfies 0.060≦Sn≦0.634−0.0082Ap. Residual ingredients are Fe and unavoidable impurities, and a metal structure of the steel sheet is a ferrite single phase. The ferritic stainless steel sheet has a ridging height of less than 6 μm. This ferritic stainless steel sheet improves the corrosion resistance and rust resistance of Cr-containing ferritic stainless steel as well as the ridging resistance.
Public/Granted literature
- US20140216614A1 FERRITIC STAINLESS STEEL PLATE WHICH HAS EXCELLENT RIDGING RESISTANCE AND METHOD OF PRODUCTION OF SAME Public/Granted day:2014-08-07
Information query