Martensitic steel
US11746402B2 · kind B2 · utility
0Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2021 |
| Grant date | Sep 5, 2023 |
| Priority date | — |
| Expiry date | Feb 11, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a steel for structural components used at elevated temperatures. The steel comprises the following main components (in wt. %): Cr 8.0-14.0 Ni 4.0-14.0 Al 2.5-5.0 C 0.003-0.3 N≤0.06 Mo+W≤4.0 at least one of: Nb 0.01-1.0 Ta 0.01-1.0 Ti 0.01-1.0 Zr 0.01-1.0 Hf 0.01-1.0 Y 0.05-1.0 balance optional elements, Fe and impurities; and the steel composition fulfilling the following condition: Cr(eq)+Ni(eq)≤30; where Cr(eq)=Cr+2Al+1.5(Si+Nb+Ti)+Mo+0.5W; and Ni(eq)=Ni+10(C+N)+0.5(Mn+Cu+Co).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.