AISI 4340 Alloy Steel Plate

AISI 4340 is a medium-carbon, low-alloy steel known for its high toughness and strength in relatively large sections. It contains nickel, chromium, and molybdenum, providing excellent hardenability. It is typically supplied hardened and tempered, offering good ductility in the annealed condition for machining and forming. It is widely used in aerospace, automotive, and heavy engineering applications requiring high fatigue resistance and impact strength.