Attributes . 67% min Nickel (Ni) + Cobalt (Co), 0.10% max Carbon (C), 2.5 - 3.5% Manganese (Mn), 3% max Iron (Fe), 0.015% max Sulphur (S), 0.50% max Copper (Cu), 0.50% max Silicon (Si), 18.0 - 22.0% Chromium (Cr), 0.75% max Titanium (Ti), 2.0 - 3.0% Niobium (Nb) + Tantalum (Ta), 0.030% max Phosphorus (P), 0.50% max Others . Names