Machining DataSheet for

General Information:
Material GroupS - Superalloys (Heat resistant and Titanium)
Sub-GroupSuperalloy
Tensile Strength [N/mm^2]
Machinability Range6% - 19%

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Equivalent International Designations for Material HS 21

Standard Name
saeASTM F-75
dinCoCr28Mo
bs3531
anforKC27D5NFe

Chemical Composition for Material HS 21

Element Amount
Cobalt (Co)62%
Chromium (Cr)27%
Molybdenum (Mo)5%
Nickel (Ni)3%
Iron (Fe)1%
Silicon (Si)0.6%
Manganese (Mn)0.6%
Titanium (Ti)0.3%
Carbon (C)0.2%

Cutting Speeds Recomendations for Heat resistant Ni or Co Based

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

ApplicationVc (m/min)Vc (SFM)
Turning25-7580-250
Milling20-5570-180
Parting15-5050-160
Grooving20-6570-210
Drilling20-6570-210

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 HS 21

* 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 HS 21

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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