Ferritic stainless steel excellent in oxidation resistance
US9157137B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2011 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Oct 12, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An object is to provide a ferritic stainless steel having excellent oxidation resistance, while preventing a deterioration in formability, without adding expensive chemical elements such as Mo and W. Specifically, the ferritic stainless steel excellent in oxidation resistance having a chemical composition containing, by mass %, C: 0.015% or less, Si: 0.40% or more and 1.00% or less, Mn: 1.00% or less, P: 0.040% or less, S: 0.010% or less, Cr: 12.0% or more and 23.0% or less, N: 0.015% or less, Nb: 0.30% or more and 0.65% or less, Ti: 0.150% or less, Mo: 0.10% or less, W: 0.10% or less, Cu: less than 1.00%, Al: 0.20% or more and 1.00% or less, while the relationship Si≧Al is satisfied, and the balance being Fe and inevitable impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.