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Alloy steel 4140 | 1.7225 | EN19 | 42CrMo4
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  • Material type

    Metal

  • Material name

    Alloy steel 4140 | 1.7225 | EN19 | 42CrMo4

  • Alternative names

    42CrMo4, 1.7225

  • Process compatibility

    CNC machining
AISI 4140 is a low-alloy steel containing chromium and molybdenum, which guarantees it reasonable strength. Additionally, it demonstrates good resistance to atmospheric corrosion. Its superior properties have led to its widespread use across various industries.
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Mechanical properties
Ultimate tensile strength
355 - 370 MPa
Yield strength
230 MPa
Young's modulus (modulus of elasticity)
208 - 216 GPa
Elongation at break
18 - 26 %
Physical properties
Corrosion resistance
Moderate to Poor
Magnetism
Semi-Magnetic
UV resistance
Excellent
Weldability
Moderate
Thermal properties
Maximum service temperature
613 - 650 °C
Thermal expansion coefficent
11.5 - 13.5 10^-6/ºC
Thermal conductivity
42 - 48 W/(m⋅°C)
Electrical properties
Electrical resistivity
20 - 25 μΩ*cm
Post treatments
Post-Processing
Tempering & Annealing
Anodizing compatibility
Not suitable
Common applications
Heavy duty shafts
Connecting rods
High tensile bolts

Tagged: metal alloy steel
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