Chemical Composition:
– Carbon (C): 0.22-0.29%
– Silicon (Si): 0.15-0.40%
– Manganese (Mn): 0.60-0.90%
– Phosphorus (P): 0.035% max
– Sulfur (S): 0.035% max
– Chromium (Cr): 0.90-1.20%
– Molybdenum (Mo): 0.15-0.30%
These elements work together to create a steel alloy with excellent hardenability, strength, and toughness.
Mechanical Properties:
– Tensile Strength: 900-1100 MPa
– Yield Strength: 800-950 MPa
– Elongation: 15-20%
– Hardness: 217-255 HB
The combination of these mechanical properties makes 25CrMo4 steel grade suitable for high-stress applications in the automotive, aerospace, and machinery industries. Its high tensile and yield strength, along with its excellent hardness, make it an ideal material for components that require durability and resistance to wear and tear.
The Science Behind the Remarkable Hardness:
The high hardness of 25CrMo4 steel grade can be attributed to the presence of chromium and molybdenum in its chemical composition. These elements form hard carbides and nitrides during heat treatment, which significantly increase the hardness of the steel. Additionally, the controlled cooling process during heat treatment further enhances the steel’s hardness and strength.
In conclusion, the unique chemical composition and mechanical properties of 25CrMo4 steel grade play a crucial role in its remarkable hardness, making it a preferred material for applications requiring high strength, toughness, and wear resistance.
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