SAE 8620 Alloy Steel Round Bars

SAE 8620 alloy steel round bars offer high surface hardness and carburizing properties. Ideal for gears, shafts, and automotive parts.

SAE 8620 is a low-alloy steel known for its excellent carburizing properties and high surface hardness.

Chemical Composition:

Mechanical Properties:

• Tensile Strength: 650 - 880 MPa
• Yield Strength (0.2% offset): 450 - 620 MPa
• Elongation: 20 - 30%
• Reduction of Area: 45 - 55%
• Impact Toughness (Charpy V-notch): 50 - 60 J/cm²

Physical Properties:

• Density: 7.85 g/cm³
• Melting Point: Approximately 1450°C (2642°F)

Heat Treatment:

• Annealing: Heat to 870-900°C (1598-1652°F), furnace cool to 800°C (1472°F) at a rate not exceeding 28°C/hour (50°F/hour), then air cool.
• Normalizing: Heat to 870-900°C (1598-1652°F), air cool.
• Quenching: Oil quench from 840-870°C (1544-1598°F), then temper immediately.
• Tempering: Temper at a desired temperature depending on the desired properties. Typical tempering temperatures range from 150-200°C (302-392°F) for achieving a balance of strength and toughness.