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US 6,605,164 B2Granted
Nickel-based alloy having high stress rupture life
AssigneeATI Properties, Inc.
InventorsRichard L. Kennedy, Wei-Di Cao
Life of this patent
Estimating the term…
Abstract
A nickel-based fine grained alloy consisting essentially of 40-55 wt % Ni, 14.5-21 wt % Cr, 2.5-5.5 wt % Nb+Ta, up to 3.3 wt % Mo, 0.65-2.00 wt % Ti, 0.10-0.8 wt % Al, up to 0.35 wt % Mn, up to 0.07 wt % C, up to 0.015 wt % S, up to 0.35 wt % Si, at least 0.016 wt % P, from 0.003 % to 0.030 wt % B, and the balance Fe and incidental impurities, has a high stress rupture life.
Claims2
A nickel-based fine grained alloy consisting essentially of
- 40-55 wt % Ni,
- 14.5-21 wt % Cr,
- 2.5-5.5 wt % Nb+Ta,
- up to 3.3 wt % Mo,
- 0.65-2.00 wt % Ti,
- 0.10-0.8 wt % Al,
- up to 0.35 wt % Mn,
- up to 0.07 wt % C,
- up to 0.015 wt % S,
- up to 0.35 wt % Si,
- from 0.020 wt % to 0.032 wt % P,
- from 0.003 wt % to 0.030 wt % B,
- with the balance Fe and incidental impurities,
- said alloy being solution heat treated at about 1750° F. for about one hour, followed by aging at about 1325° F. for about eight hours, and having a stress rupture life, when tested at 1200° F. and 100 Ksi, of at least 500 hours.
11 more elements
A nickel-based fine grained alloy consisting essentially of
- 40-55 wt % Ni,
- 14.5-21 wt % Cr,
- 2.5-5.5 wt % Nb+Ta,
- up to 3.3 wt % Mo,
- 0.65-2.00 wt % Ti,
- 0.10-0.8 wt % Al,
- up to 0.35 wt % Mn,
- up to 0.07 wt % C,
- up to 0.015 wt % S,
- up to 0.35 wt % Si,
- from 0.020 wt % to 0.032 wt % P,
- from 0.003 wt % to 0.030 wt % B,
- with the balance Fe and incidental impurities,
- said alloy having a stress rupture life, when tested at 1200° F. and 100 Ksi, of at least 500 hours, after solution heat treating at about 1750° F. for about one hour followed by aging at about 1325° F. for about eight hours.
11 more elements
Dependencies are inferred from the claim text.