Claims
- 1. 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, with the balance Fe and incidental impurities, said alloy being solution heat treated for about 1750° F. for about one hour and having a stress rupture life, when tested at 1200° F. and 100 Ksi, of at least 250 hours.
- 2. 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, 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 250 hours, after solution heat treating at about 1750° F. for about one hour followed by aging at about 1325° F. for about eight hours.
- 3. 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, with the balance Fe and incidental impurities, whereby said alloy has a stress rupture life, when tested at 1200° F. and 100 Ksi, of at least 250 hours, after solution heat treating at about 1750° F. for about one hour followed by aging at about 1325° F. for about eight hours.
Parent Case Info
[0001] This application is a continuation of application Ser. No. 09/264944, filed Jun. 24, 1994.
Continuations (1)
|
Number |
Date |
Country |
Parent |
08264944 |
Jun 1994 |
US |
Child |
09844696 |
Apr 2001 |
US |