AISI 4140 Alloy Steel Induction Hardened Q+T Rod

Chemical Composition:

• Carbon (C): 0.38 – 0.43%
• Manganese (Mn): 0.75 – 1.00%
• Phosphorus (P): Max 0.035%
• Sulfur (S): Max 0.040%
• Silicon (Si): 0.15 – 0.35%
• Chromium (Cr): 0.80 – 1.10%
• Molybdenum (Mo): 0.15 – 0.25%

Mechanical Properties:

• Tensile Strength: 850 – 1000 MPa
• Yield Strength: 650 MPa (minimum)
• Elongation: 20% (minimum)
• Hardness: 28 – 32 HRC
• Impact Toughness: 40 J (minimum) at -20°C

Key Characteristics:

• Induction Hardened: The surface of the rod is hardened to increase wear resistance while maintaining a tough core.
• Quenched and Tempered (Q+T): This heat treatment process enhances the overall strength and toughness of the rod, making it suitable for high-stress applications.

Typical Applications:

• Hydraulic cylinders
• Automotive components
• Machinery parts
• Heavy equipment