AISI 4340 FORGED ALLOY STEEL BAR is a nickel-chromium-molybdenum alloy steel known for its toughness and its ability to attain high strengths in the heat-treated condition. It has very good fatigue resistance.
|Standard||Grade||Chemical composition (%)|
Forged steel round bar: dia100mm-dia1500mm
Forged flat bar: thickness20mm-400mm, width80mm-1000mm
Forged steel block: 100mm*100mm-1000mm*1000mm
Available Heat Treatment
AISI 4340 alloy steel is annealed at 844°C (1550°F) followed by cooling the furnace.
AISI 4340 alloy steel should be in the heat treated or normalized and heat treated condition before tempering. Tempering temperatures depend upon the desired strength level.
AISI 4340 alloy steel can be hardened by cold working or heat treatment.
Good toughness, high strengths in the heat-treated condition, very good fatigue resistance.
AISI 4340 alloy steel is mainly used in power transmission gears and shafts, aircraft landing gear, and other structural parts.
Forged, black surface/ machined surface with customers’ required heat treatment