Ultra supercritical boiler header alloy and method of preparation
US10260129B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Aug 1, 2018 |
| Grant date | Apr 16, 2019 |
| Priority date | — |
| Expiry date | Aug 1, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22B37/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high temperature, high strength Ni—Co—Cr alloy is provided. The alloy includes, in weight percent (wt. %): 23.5 to 25.5% Cr, 15.0 to 22.0% Co, 1.1 to 2.0% Al, 1.0 to 1.8% Ti, 0.95 to 2.2% Nb, less than 1.0% Mo, less than 1.0% Mn, up to 0.24% Si, less than 3.0% Fe, less than 0.3% Ta, less than 0.3% W, 0.005 to 0.08% C, 0.01 to 0.3% Zr, 0.0008 to 0.006% B, up to 0.05% rare earth metals, and a balance of Ni plus trace impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.