Patent ID: 6605164
Filing Date: 2003-08-12
Classification: C22C

Abstract:
A nickel-based fine grained alloy consisting essentially of40-55 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 1750Â° F. for about one hour, followed by aging at about 1325Â° F. for about eight hours, and having a stress rupture life, when tested at 1200Â° F. and 100 Ksi, of at least 500 hours.