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  • Metal

    Material type

  • Alloy steel 4340 | 1.6511 | 36CrNiMo4 | EN24

    Material name

  • 30CrNiMo8, 1.658

    Alternative names

  • CNC machining

    Process compatibility

Mechanical properties
Ultimate tensile strength
690 - 1080 MPa
Yield strength
470 - 630 MPa
Young's modulus (modulus of elasticity)
205 - 213 GPa
Elongation at break
15 - 22 %
Physical properties
Corrosion resistance
Moderate to Poor
Magnetism
Semi-Magnetic
UV resistance
Excellent
Weldability
Moderate
Thermal properties
Maximum service temperature
613 - 652 °C
Thermal expansion coefficent
11.5 - 13 10^-6/ºC
Thermal conductivity
35 - 50 W/(m⋅°C)
Electrical properties
Electrical resistivity
18 - 27 μΩ*cm
Post treatments
Post-Processing
Tempering & Annealing
Anodizing compatibility
Not suitable
Common applications
General engineering parts
Connecting rods & bolts
High tensile applications

Tagged: metal alloy steel
Alloy steel 4340 | 1.6511 | 36CrNiMo4 | EN24

Alloy steel 4340 (CNC) can be heat treated to high strength, while maintaining good toughness, wear resistance and fatigue strength. Weldable.

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