Mechanical properties:
– Tensile strength: 900-1100 MPa
– Yield strength: 650-800 MPa
– Elongation: 12-14%
– Fatigue strength: 400-600 MPa
– Hardness: 230-280 HB
Technical properties:
– Density: 7.85 g/cm3
– Young’s modulus: 210 GPa
– Poisson’s ratio: 0.27-0.30
– Thermal conductivity: 42.6 W/mK
– Thermal expansion: 11.4 μm/m°C
Chemical composition:
– Carbon (C): 0.38-0.45%
– Silicon (Si): 0.40%
– Manganese (Mn): 0.60-0.90%
– Phosphorus (P): 0.025%
– Sulfur (S): 0.035%
– Chromium (Cr): 0.90-1.20%
– Molybdenum (Mo): 0.15-0.30%
The combination of these mechanical, technical, and chemical properties makes 42CrMo4 steel grade a versatile and reliable material for high-stress applications. Its high tensile and yield strength, along with good toughness and fatigue resistance, make it a popular choice in various industries. Additionally, its relatively low carbon content and addition of chromium and molybdenum contribute to its excellent hardenability and wear resistance.
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