Steel alloy having improved creep strength
US5393487A · kind A · utility
7Cited by
34References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1993 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Aug 17, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/54
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An austenitic steel alloy is provided having improved creep strength at high temperature. The improved creep strength performance is achieved by adding a limited amount of silicon to the steel alloy along with increased amounts of nitrogen and columbium, also known as niobium. The added columbium ties up the carbon in the alloy composition to prevent sensitization promotion and premature corrosion-fatigue failures. The resulting steel alloy provides improved strength, improved carburization resistance, and maintains good weldability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.