Machining DataSheet for

General Information:
Material GroupS - Superalloys (Heat resistant and Titanium)
Sub-GroupSuperalloy
Hardness390.0 HB
Tensile Strength660 [N/mm^2]
Machinability Range0% - 0%

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Equivalent International Designations for Material 21-6-9

Standard Name
saeASTM A666

Chemical Composition for Material 21-6-9

Element Amount
Iron (Fe)62%
Chromium (Cr)21%
Manganese (Mn)9%
Nickel (Ni)6.5%
Silicon (Si)1%
Carbon (C)0.08%

Cutting Speeds Recomendations for Heat resistant Fe Based

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

ApplicationVc (m/min)Vc (SFM)
Turning100-200330-660
Milling75-150250-490
Parting65-125210-410
Grooving90-175300-570
Drilling90-175300-570

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 21-6-9

* 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 21-6-9

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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