EN25 Alloy Steel Round Bars

EN25 alloy steel is commonly used in applications where high mechanical properties are required, such as gears, shafts, and axles in the automotive and aerospace industries.

Details Regarding EN25 Alloy Steel Round Bars:

Chemical Composition:

Mechanical Properties:

• Tensile Strength: 850-1000 MPa
• Yield Strength: 700-850 MPa
• Elongation: 15-20% (in 50 mm)
• Hardness: 269-331 HB

Physical Properties:

• Density: ~7.85 g/cm³
• Melting Point: ~1420-1470°C

Heat Treatment:

EN25 alloy steel typically undergoes various heat treatment processes to achieve desired mechanical properties:

Annealing: Heating the material to around 850-900°C and then slowly cooling it in the furnace to relieve internal stresses and improve machinability.

Normalizing: Heating the material to around 880-920°C, followed by air cooling to room temperature. This process refines the grain structure and enhances the mechanical properties.

Hardening: Heating the material to a temperature range of 860-900°C and then quenching it in oil or water to achieve high hardness and strength.

Tempering: Reheating the hardened material to a temperature range of 540-680°C and holding it for a specific time to reduce internal stresses and improve toughness without significantly sacrificing hardness.