34CrNiMo6 Alloy Steel Round Bars

34CrNiMo6 Alloy Steel Round Bars is a chromium-molybdenum alloy steel known for its high strength, toughness, and hardenability.

Heat Treatment Alloy Steel offers excellent fatigue resistance and good wear properties, making it suitable for demanding applications in industries like automotive, aerospace, and machinery. 

Application:

The 34CrNiMo6 Alloy Steel Round Bars is commonly used in the manufacture of gears, crankshafts, axle shafts, and other components subjected to heavy loads and high stress. The alloy can be heat treated to achieve desired mechanical properties, including high tensile strength and good impact toughness. Additionally, it exhibits good machinability in the annealed or normalized condition.

Chemical Composition:

Mechanical Properties (Typical values for quenched and tempered condition):

• Tensile Strength: 1000 - 1200 MPa
• Yield Strength (0.2% offset): 800 - 1000 MPa
• Elongation: 11 - 14%
• Reduction of Area: 40 - 50%
• Impact Toughness (Charpy V-notch): 30 - 40 J/cm²

Physical Properties:

• Density: 7.85 g/cm³
• Melting Point: Approximately 1420°C (2588°F)

Heat Treatment:

• Annealing: Heat to 850-890°C (1562-1634°F), furnace cool at a rate not exceeding 30°C (54°F) per hour to 650°C (1202°F), then cool in air.
• Normalizing: Heat to 870-920°C (1598-1688°F), air cool.
• Quenching: Oil quench from 850-880°C (1562-1616°F) or water quench from 830-860°C (1526-1580°F), followed by tempering.
• Tempering: Temper at a desired temperature depending on the desired properties. Typical tempering temperatures range from 550-650°C (1022-1202°F) for achieving a balance of strength and toughness.