Duplex stainless steel
US11555231B2 · kind B2 · utility
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1References
15Claims
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Assignee
Inventors
Key dates
| Filing date | Sep 5, 2012 |
| Grant date | Jan 17, 2023 |
| Priority date | — |
| Expiry date | Sep 29, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates a duplex ferritic austenitic stainless steel having high formability utilizing the TRIP effect and high corrosion resistance with the balanced pitting resistance equivalent. The duplex stainless steel contains less than 0.04 weight % carbon, less than 0.7 weight % silicon, less than 2.5 weight % manganese, 18.5-22.5 weight % chromium, 0.8-4.5 weight % nickel, 0.6-1.4 weight % molybdenum, less than 1 weight % copper, 0.10-0.24 weight % nitrogen, the rest being iron and inevitable impurities occurring in stainless steels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.