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Metal
AISI 4140 | 1.7225 | 42CrMo4 | SCM440
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Alloy Steel 4140 is a medium-carbon chromium-molybdenum alloy structural steel with excellent strength, toughness, and hardenability. The material is typically processed in the annealed/normalized condition and undergoes quenching and tempering to enhance mechanical properties. It is suitable for large-section structural components subjected to high loads and impact forces.
650 - 1000 MPa
850 - 1100 MPa
12 - 22 %
235-350 HB
205 - 210 GPa
400 - 500 °C
42–46 W/(m·K) (at 20°C)
11.0 - 12.5 μm/(m·°C)
7.85 g/cm³
20 - 25 μΩ·cm
poor
Fair
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