Creep-resistant, cobalt-free alloys for high temperature, liquid-salt heat exchanger systems
US9435011B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Aug 8, 2013 |
| Grant date | Sep 6, 2016 |
| Priority date | — |
| Expiry date | Dec 6, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An essentially Fe- and Co-free alloy is composed essentially of, in terms of weight percent: 6.0 to 7.5 Cr, 0 to 0.15 Al, 0.5 to 0.85 Mn, 11 to 19.5 Mo, 0.03 to 4.5 Ta, 0.01 to 9 W, 0.03 to 0.08 C, 0 to 1 Re, 0 to 1 Ru, 0 to 0.001 B, 0.0005 to 0.005 N, balance Ni, the alloy being characterized by, at 850° C., a yield strength of at least 25 Ksi, a tensile strength of at least 38 Ksi, a creep rupture life at 12 Ksi of at least 25 hours, and a corrosion rate, expressed in weight loss [g/(cm2 sec)]10−11 during a 1000 hour immersion in liquid FLiNaK at 850° C., in the range of 3 to 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.