HIGH-STRENGTH ARMOR SHEET STEEL Russian patent published in 2002 - IPC

FIELD: steelmaking process; production of high-strength armor sheet steel for manufacture of bullet-proof jackets, shields, helmets and other protective devices for protection of persons against small arms; manufacture of light armored vehicles, type infantry fighting vehicle, armored fighting vehicle, reconnaissance vehicle etc. SUBSTANCE: steel contains the following components, mas.%: carbon, 0.44-0.48; silicon, 0.2-0.4; manganese, 0.4-0.7; chromium, 1.12-1.4; nickel, 1.3-1.8; molybdenum, 0.31-0.5; vanadium, 0.15- 0.25; and iron, the balance. EFFECT: enhanced bullet-proof resistance of steel armor against piercing action of bullets with thermally hardened slugs, 7.62 and 5.45 calibers; reduced thickness of armor below 6.3 mm; reduced mass. 1 dwg, 2 tbl, 1 ex