Metal injection molded ammunition cartridge

A metal injection molded ammunition cartridge comprising:

• a metal injection molded metal bottom portion comprising
• a nose connection surface at a first end opposite a primer insert end at a second end connected by a cylindrical propellant chamber wherein the primer insert end comprises a primer flash hole that extends from the propellant chamber into a primer recess adapted to accept a primer;
• a metal injection molded metal nose portion that mates to the metal injection molded metal bottom portion comprising
• a projectile aperture at a first end adapted to receive a projectile,
• a neck that extends from the projectile aperture to a shoulder region, and
• a bottom connection surface the extends from the neck and mates to the nose connection surface to enclose the propellant chamber, to form a metal injection molded ammunition cartridge wherein the metal injection molded metal bottom portion, the metal injection molded metal nose portion or both comprise:
• a) 2-16 w % Ni;
• 10-20 w % Cr;
• 0-5 w % Mo;
• 0-0.6 w % C;
• 0-6.0 w % Cu;
• 0-0.5 w % Nb+Ta;
• 0-4.0 w % Mn;
• 0-2.0 w % Si and the balance Fe;
• b) 2-6 w % Ni;
• 13.5-19.5 w % Cr;
• 0-0.10 w % C;
• 1-7.0 w % Cu;
• 0.05-0.65 w % Nb+Ta;
• 0-3.0 w % Mn;
• 0-3.0 w % Si and the balance Fe;
• c) 3-5 w % Ni;
• 15.5-17.5 w % Cr;
• 0-0.07 w % C;
• 3-5.0 w % Cu;
• 0.15-0.45 w % Nb+Ta;
• 0-1.0 w % Mn;
• 0-1.0 w % Si and the balance Fe;
• d) 10-14 w % Ni;
• 16-18 w % Cr;
• 2-3 w % Mo;
• 0-0.03 w % C;
• 0-2 w % Mn;
• 0-1 w % Si and the balance Fe;
• e) 12-14 w % Cr;
• 0.15-0.4 w % C;
• 0-1 w % Mn;
• 0-1 w % Si and the balance Fe;
• f) 16-18 w % Cr;
• 0-0.05 w % C;
• 0-1 w % Mn;
• 0-1 w % Si and the balance Fe;
• g) 3-12 w % aluminum, 2-8 w % vanadium, 0.1-0.75 w % iron, 0.1-0.5 w % oxygen, and the remainder titanium;
• or
• h) about 6 w % aluminum, about 4 w % vanadium, about 0.25 w % iron, about 0.2 w % oxygen, and the remainder titanium.

The unitary metal injection molded ammunition cartridge of claim 10, wherein the metal injection molded metal bottom portion, the metal injection molded metal nose portion or both comprises

• a) 2-16 w % Ni;
• 10-20 w % Cr;
• 0-5 w % Mo;
• 0-0.6 w % C;
• 0-6.0 w % Cu;
• 0-0.5 w % Nb+Ta;
• 0-4.0 w % Mn;
• 0-2.0 w % Si and the balance Fe;
• b) 2-6 w % Ni;
• 13.5-19.5 w % Cr;
• 0-0.10 w % C;
• 1-7.0 w % Cu;
• 0.05-0.65 w % Nb+Ta;
• 0-3.0 w % Mn;
• 0-3.0 w % Si and the balance Fe;
• c) 3-5 w % Ni;
• 15.5-17.5 w % Cr;
• 0-0.07 w % C;
• 3-5.0 w % Cu;
• 0.15-0.45 w % Nb+Ta;
• 0-1.0 w % Mn;
• 0-1.0 w % Si and the balance Fe;
• d) 10-14 w % Ni;
• 16-18 w % Cr;
• 2-3 w % Mo;
• 0-0.03 w % C;
• 0-2 w % Mn;
• 0-1 w % Si and the balance Fe;
• e) 12-14 w % Cr;
• 0.15-0.4 w % C;
• 0-1 w % Mn;
• 0-1 w % Si and the balance Fe;
• f) 16-18 w % Cr;
• 0-0.05 w % C;
• 0-1 w % Mn;
• 0-1 w % Si and the balance Fe;
• g) 3-12 w % aluminum, 2-8 w % vanadium, 0.1-0.75 w % iron, 0.1-0.5 w % oxygen, and the remainder titanium;
• or
• h) about 6 w % aluminum, about 4 w % vanadium, about 0.25 w % iron, about 0.2 w % oxygen, and the remainder titanium.