Method of making a metal injection molded ammunition cartridge

A method of making a metal injection molded ammunition cartridge comprising the steps of:

• providing an ammunition cartridge mold comprising a bottom portion having a primer recess extending into the bottom portion adapted to receive a primer, a flash hole positioned in the primer recess through the bottom surface;
• side walls extending from the bottom portion to a nose end aperture, wherein a propellant chamber is formed between the nose end aperture and the bottom surface;
• injecting a metal composition into the ammunition cartridge mold to form a metal injection molded ammunition cartridge, wherein the metal composition comprises 2-16% Ni;
• 10-20% Cr;
• 0-5% Mo;
• 0-0.6% C;
• 0-6.0% Cu;
• 0-0.5% Nb+Ta;
• 0-4.0% Mn;
• 0-2.0% Si and the balance Fe;
• 2-6% Ni;
• 13.5-19.5% Cr;
• 0-0.10% C;
• 1-7.0% Cu;
• 0.05-0.65% Nb+Ta;
• 0-3.0% Mn;
• 0-3.0% Si and the balance Fe;
• 3-5% Ni;
• 15.5-17.5% Cr;
• 0-0.07% C;
• 3-5.0% Cu;
• 0.15-0.45% Nb+Ta;
• 0-1.0% Mn;
• 0-1.0% Si and the balance Fe;
• 10-14% Ni;
• 16-18% Cr;
• 2-3% Mo;
• 0-0.03% C;
• 0-2% Mn;
• 0-1% Si and the balance Fe;
• 12-14% Cr;
• 0.15-0.4% C;
• 0-1% Mn;
• 0-1% Si and the balance Fe;
• 16-18% Cr;
• 0-0.05% C;
• 0-1% Mn;
• 0-1% Si and the balance Fe;
• 3-12% aluminum, 2-8% vanadium, 0.1-0.75% iron, 0.1-0.5% oxygen, and the remainder titanium;
• or 6% aluminum, about 4% vanadium, about 0.25% iron, about 0.2% oxygen, and the remainder titanium;
• and
• removing the metal injection molded ammunition cartridge from the ammunition cartridge mold.

A method of making a metal injection molded ammunition cartridge comprising the steps of:

• providing an ammunition cartridge mold comprising a bottom portion having a primer recess extending into the bottom portion adapted to receive a primer, a flash hole positioned in the primer recess through the bottom surface;
• side walls extending from the bottom portion to a nose end aperture, wherein a propellant chamber is formed between the nose end aperture and the bottom surface;
• injecting a metal composition into the ammunition cartridge mold to form a metal injection molded ammunition cartridge, wherein the metal composition comprises a) 2-16% Ni;
• 10-20% Cr;
• 0-5% Mo;
• 0-0.6% C;
• 0-6.0% Cu;
• 0-0.5% Nb+Ta;
• 0-4.0% Mn;
• 0-2.0% Si and the balance Fe;
• b) 2-6% Ni;
• 13.5-19.5% Cr;
• 0-0.10% C;
• 1-7.0% Cu;
• 0.05-0.65% Nb+Ta;
• 0-3.0% Mn;
• 0-3.0% Si and the balance Fe;
• c) 3-5% Ni;
• 15.5-17.5% Cr;
• 0-0.07% C;
• 3-5.0% Cu;
• 0.15-0.45% Nb+Ta;
• 0-1.0% Mn;
• 0-1.0% Si and the balance Fe;
• d) 10-14% Ni;
• 16-18% Cr;
• 2-3% Mo;
• 0-0.03% C;
• 0-2% Mn;
• 0-1% Si and the balance Fe;
• e) 12-14% Cr;
• 0.15-0.4% C;
• 0-1% Mn;
• 0-1% Si and the balance Fe;
• f) 16-18% Cr;
• 0-0.05% C;
• 0-1% Mn;
• 0-1% Si and the balance Fe;
• g) 3-12% aluminum, 2-8% vanadium, 0.1-0.75% iron, 0.1-0.5% oxygen, and the remainder titanium;
• or h) about 6% aluminum, about 4% vanadium, about 0.25% iron, about 0.2% oxygen, and the remainder titanium;
• and
• removing the metal injection molded ammunition cartridge from the ammunition cartridge mold.