High strength precipitation hardening stainless steel alloy and article made therefrom

A stainless steel alloy comprising, by weight %:

• more than 14% and less than 30% nickel (Ni),
• about 0-10.0% cobalt (Co),
• about 8.0 and less than 15.0% chromium (Cr),
• about 5.0% max molybdenum (Mo),
• more than 1% and less than 3.0% titanium (Ti),
• more than 1% and less than 3.0% vanadium (V),
• about 0%-1% manganese (Mn),
• about 0%-1% copper (Cu),
• about 0%-0.01% zirconium (Zr),
• about 0%-1.0% niobium (Nb),
• about 0%-0.03% carbon (C),
• about 0%-0.03% nitrogen (N),
• about 0%-0.01% sulphur (S),
• about 0%-0.015% phosphorus (P),
• about 0 and less than 0.1% aluminum (Al),
• about 0%-0.01% boron (B),
• about 0%-1.0% silicon (Si),
• about 0%-0.01% magnesium (Mg),
• about 0%-0.01% calcium (Ca),
• about 0%-0.01% lanthanum (La),
• about 0%-0.01% cerium (Ce), and
• the balance is iron (Fe) and inevitable impurities,
• wherein the stainless steel alloy comprises a high strength precipitation hardened stainless steel alloy comprising one or more intermetallic phases of Ni3Ti, Ni3(Ti, V), and (Ni, M11)3(Ti, M21) and one or more intermetallic phases of Ni3V, Ni3(V, Ti), and (Ni, M12)3(V, M22), wherein M11 and M12 are one or more elements of Fe, Co, Cu, and Mn for Ni-site substitution, and wherein M21 is one or more elements of V, Mo, Nb, Fe, and Si for Ti-site substitution and M22 are one or more elements of—Ti, Mo, Nb, Fe, —and Si for V-site substitution.

A stainless steel alloy comprising, by weight %:

• more than 14% and less than 20% nickel (Ni),
• about 8.0%-less than 15.0% chromium (Cr),
• about 3.0% max molybdenum (Mo),
• more than 1.0% and less than 3.0% titanium (Ti),
• more than 1.0% and less than 3.0% vanadium (V),
• about 0%-1.0% manganese (Mn),
• about 0%-1.0% copper (Cu),
• about 0%-0.01% zirconium (Zr),
• about 0%-1.0% niobium (Nb),
• about 0%-0.03% carbon (C),
• about 0%-0.03% nitrogen (N),
• about 0%-0.01% sulphur (S),
• about 0%-0.015% phosphorus (P),
• about 0% and less than 0.1% aluminum (Al),
• about 0%-0.01% boron (B),
• about 0%-1.0% silicon (Si),
• about 0%-0.01% magnesium (Mg),
• about 0%-0.01% calcium (Ca),
• about 0%-0.01% lanthanum (La),
• about 0%-0.01% cerium (Ce),
• and the balance is iron (Fe) and inevitable impurities, and
• wherein said stainless steel alloy has precipitates comprising a) one or more of Ni3Ti, Ni3(Ti, V), and (Ni, M11)3(Ti, M21) and b) one or more of Ni3V, Ni3(V, Ti), and (Ni, M12)3(V, M22), wherein M11 and M12 are one or more elements of Fe, Cu, and Mn for Ni-site substitution, and wherein M21 is one or more of V, Mo, Nb, Fe, and Si for Ti-site substitution and M22 are one or more elements of Ti, Mo, Nb, Fe and Si for V-site substitution.