Understanding the Properties and Uses of 708M20 Steel Grade

The 708M20 steel grade is a low carbon, nickel-chromium molybdenum case hardening steel. It is commonly used in applications where high surface hardness, toughness, and wear resistance are required, such as gears, shafts, and other automotive components.

Mechanical Properties:
– Tensile Strength: 650-800 MPa
– Yield Strength: 360-450 MPa
– Elongation: 13-18%
– Hardness: 290-340 Brinell

Chemical Composition:
– Carbon (C): 0.17-0.23%
– Silicon (Si): 0.10-0.40%
– Manganese (Mn): 0.60-0.90%
– Phosphorus (P): 0.035% max
– Sulfur (S): 0.040% max
– Chromium (Cr): 0.40-0.70%
– Nickel (Ni): 1.60-1.90%
– Molybdenum (Mo): 0.20-0.35%

The 708M20 steel grade offers good core strength and hardenability, making it suitable for use in applications that require high toughness and wear resistance. It can be heat treated to achieve high surface hardness, making it ideal for components subjected to high stress and friction. Its chemical composition provides good machinability and weldability, making it a versatile choice for various engineering applications.
708M20 Steel grade
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