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CNC Machining Service for Alloy steel 4340 | 1.6511 | 36CrNiMo4 | EN24

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  • Material type

    Metal

  • Material name

    Alloy steel 4340 | 1.6511 | 36CrNiMo4 | EN24

  • Alternative names

    30CrNiMo8, 1.658

  • Process compatibility

    CNC machining
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

Alloy Steel 4340 (1.6511 | 36CrNiMo4 | EN24) CNC Machining Applications & Parts

Alloy Steel 4340 is a high-strength, low-alloy steel renowned for its exceptional toughness, fatigue strength, and good wear resistance, especially after heat treatment. We specialize in machining this robust material for the most demanding applications.

Typical Parts We Machine from Alloy Steel 4340:

  • Aerospace & Defense: Landing gear components, helicopter rotor shafts, high-strength bolts
  • Oil & Gas: Drill collars, tool joints, heavy-duty axles and shafts
  • Tooling & Molds: Die casting molds, plastic injection molds, heavy-duty fixtures

Our Machining Advantage:

Our capability to machine 4340 in both annealed and pre-hardened conditions (up to ~40 HRC) allows us to deliver ready-to-use components or precise preforms for final heat treatment.

Get an Instant Quotefor your custom Alloy Steel 4340 parts today.

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