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AISI 4340 Ni-Cr-Mo Steel
Premium quality Nickel-Chromium-Molybdenum alloy steel offering the highest balance of strength, ductility, and toughness.
AISI 4340: Ultimate Strength & Toughness
AISI 4340 is a heat-treatable, low alloy steel containing nickel, chromium, and molybdenum. It is known for its toughness and capability of developing high strength in the heat-treated condition while retaining good fatigue strength.
Key Features & Properties
- Strength: Can exceed 1500 MPa after heat treatment.
- Toughness: Extremely high toughness and ductility.
- Hardenability: Deep hardenability for large sections.
- Fatigue Performance: Superior fatigue resistance for critical cyclic loading.
Typical Applications
- Aircraft landing gear and structural components
- Heavy-duty crankshafts and camshafts
- High-load transmission gears and shafts
- Power transmission gears and shafts
Technical Specifications
AISI 4340 is often used where other alloy steels do not provide the necessary hardenability or strength. It is the standard against which other ultra-high strength steels are compared.
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