Ferritic stainless steel sheet having superior sulfuric acid corrosion resistance and method for manufacturing the same
US8152937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2008 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Aug 15, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a ferritic stainless steel sheet which has excellent corrosion resistance against sulfuric acid in the high-temperature environment and shows less surface roughness at a bent part which is bent at 90° or more. Specifically disclosed is a ferritic stainless steel sheet which has the following chemical composition: C: 0.02 mass % or less, Si: 0.05 to 0.8 mass %, Mn: 0.5 mass % or less, P: 0.04 mass % or less, S: 0.010 mass % or less, Al: 0.10 mass % or less, Cr: 20 to 24 mass % Cu: 0.3 to 0.8 mass %, Ni: 0.5 mass % or less, Nb: 0.20 to 0.55 mass %, and N: 0.02 mass % or less, with the remainder being Fe and unavoidable impurities; and which has such a structure that the maximum particle diameter of an S-containing precipitate is 5 μm or smaller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.