4140 Alloy Steel Bar​

Short Description:

4140 Alloy Steel is a versatile medium carbon steel alloy known for its excellent strength, hardness, and wear resistance. It contains chromium (Cr), molybdenum (Mo), and manganese (Mn) as key alloying elements that enhance its hardenability, toughness, and fatigue resistance.


Product Detail

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Category Details
Composition Carbon (C): 0.38–0.43%
Chromium (Cr): 0.80–1.10%
Molybdenum (Mo): 0.15–0.25%
Manganese (Mn): 0.75–1.00%
Silicon (Si): 0.20–0.35%
Properties - High tensile strength and impact toughness
- Good resistance to wear and fatigue
- Can be heat treated to improve hardness and strength
- Good machinability and weldability in annealed form
Applications - Automotive components (e.g., gears, shafts, crankshafts)
- Industrial machinery (e.g., axles, spindles)
- Oil and gas equipment
- Aircraft parts (under specific conditions)
Heat Treatment - Can be hardened through quenching and tempering to achieve various strength and hardness levels
- Suitable for a wide range of mechanical applications

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