Austenitic heat resistant alloy
US8808473B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2012 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | May 16, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C19/055
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An austenitic heat resistant alloy includes, by mass percent, C: 0.15% or less, Si: 2% or less, Mn: 3% or less, Ni: 40 to 60%, Co: 10.14 to 25%, Cr: 15% or more and less than 28%, either one or both of Mo: 12% or less and W: less than 0.05%, the total content thereof being 0.1 to 12%, Nd: 0.001 to 0.1%, B: 0.0005 to 0.006%, N: 0.03% or less, O: 0.03% or less, at least one selected from Al: 1.36% or less, Ti: 3% or less, and Nb: 3% or less, and the balance being Fe and impurities. The contents of P and S in the impurities are P: 0.03% or less and S: 0.01% or less. The alloy satisfies 1≦4×Al+2×Ti+Nb≦12 and P+0.2×Cr×B≦0.035, where an element in the Formulas represents the content by mass percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.