Patent ID: 7879159

Claim:
A stainless steel alloy comprising, in combination, by weight about: 0.002 to 0.015 carbon (C), 2 to 15% cobalt (Co), 7.0 to 14.0% nickel (Ni), 8.0 to 15.0% chromium (Cr), 0.5 to 2.6% molybdenum (Mo), 0.45 to 0.75% titanium (Ti), 0.5% tungsten (W), 0.7% aluminum (Al), and the balance essentially iron (Fe) and incidental elements and impurities, characterized in that the alloy avoids copper (Cu) as an alloying constituent, has a predominantly lath martensite microstructure having been quenched from high temperature at below a TiC solvus temperature in a TiC+FCC two-phase field without requiring cold work, essentially without topologically close packed (TCP) intermetallic phases and said carbon (C) is in a dispersion of 0.02 to 0.15% by volume TiC carbide particles and further including a dispersion of intermetallic particles primarily of Ni 3 Ti η phase as a strengthening phase.