Exploring the Strength and Durability of 42CrMo4 Steel Grade

[ad_1] The 42CrMo4 steel grade is a low-alloy steel that is known for its high strength and toughness. It is commonly used in the automotive and aerospace industries for applications such as crankshafts, gears, and axles.

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.