Machining DataSheet for

General Information:
Material GroupS - Superalloys (Heat resistant and Titanium)
Sub-GroupSuperalloy
Hardness42.0 HRC
Tensile Strength1330 [N/mm^2]
Machinability10%

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Machining Material Inconel 718

Inconel 718 is a Nickel-based heat resistant superalloy (HRSA) material with a Machinability rating of 10% and Hardness of 42 HRC. It has 54% nickel and additional alloying elements per the below table.

Inconel 718 is the most widely used heat resistance superalloy (HRSA) due to its high strength over a vast temperature range. It can be used in environments from sub-zero up to 1300°F/704°C. Throughout this entire range, it exhibits exceptionally high yield, tensile and creep-rupture properties. It is often encountered in jet-engine components, turbochargers, and heat-exchangers.

It should be machined with positive and sharp cutting edges. Geometries that are suitable for austenitic stainless steel will also work well on HRSA. However, quality manufacturers will have different geometries specifically designed for nickel-based alloys in their catalogs.

Summery:

  • For general Turning of Material Inconel 718 at stable conditions use a grade with a Very Hard substrate and PVD coating.
  • For general Milling use a grade with a Semi Hard substrate and PVD coating.
  • For detailed carbide grades recommendations, check the Below Chart, or use the Grades Wizrad.
  • Recommended Cutting speed range for turning at stable conditions is 110 - 150 [SFM] / 35 - 45 [m/min].
  • Consider using CBN inserts. Although they cost more than twice, they enable increasing the cutting speed by 2-4 times (relative to carbide). Learn More ⇒
  • Recommended Cutting speed range for milling with stable clamping and short overhang is 80 - 110 [SFM] / 25 - 35 [m/min]
  • For detailed cutting speed recomendations, check the Below Table, or use our Speed and Feed Calculator.

    • Equivalent International Designations for Material Inconel 718

    Standard Name
    sae5383
    wnr2.4668
    dinNiCr19Fe19NbMo
    unsUNS N07718
    bsHR8
    anforNC19FeNb

    Chemical Composition for Material Inconel 718

    Element Amount
    Nickel (Ni)54%
    Iron (Fe)18.0%
    Chromium (Cr)18%
    Molybdenum (Mo)3.1%
    Titanium (Ti)0.9%
    Aluminum (Al)0.5%
    Carbon (C)0.02%

    Cutting Speeds Recomendations for Material Inconel 718

    * Click on the speeds below for higher precision in specific conditions!

    ApplicationVc (m/min)Vc (SFM)
    Turning35-45110-150
    Milling25-3580-110
    Parting20-3070-100
    Grooving30-40100-130
    Drilling30-40100-130

    Important! The speed estimation is given for an ideal situation:

    • Most suitable carbide grade
    • Stable tool clamping
    • Stable workpiece clamping
    • Good quality raw material
    • A short overhang of the cutting tool.
    • Nominal hardness of the material.
    • etc.
    Click on the speeds in the above table to get better precision for specific parameters
    Or use our Speed and Feed Calculator


    Recommended Carbide Grades for Material Inconel 718

    * If you do nott understand the below table? Read This Explanation to make the most out of it!

    Grade for Turning

    Grade for Parting Off

    Grade for Grooving

    Grade for Milling (Indexable)

    Recommended Insert Cutting Edge Geometry for Material Inconel 718

    Honing Size:0.02-0.05 mm / 0.001-0.002"
    Rake Angle:13° -18°
    Land Angle:Neutral
    Land Width:0.10-0.20 mm / 0.004-0.008"
    Ground Insert:Recommended

    Learn more about carbide inserts Cutting-Edge Geometry Parameters.

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