Machining DataSheet for

General Information:
Material GroupK - Cast Iron
Sub-GroupCast Iron
Tensile Strength360-740 [N/mm^2]
Machinability Range140% - 210%

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Equivalent International Designations for Cast Iron GTW-40-05

Standard Name
wnr0.8040
dinGTW-40-05

Chemical Composition for Cast Iron GTW-40-05

Sorry, Not Availble for this Material


Cutting Speeds Recomendations for Malleable cast iron - Ferritic

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

ApplicationVc (m/min)Vc (SFM)
Turning320-4851050-1590
Milling215-325710-1070
Parting160-240520-790
Grooving225-335740-1100
Drilling180-275590-900

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 Cast Iron GTW-40-05

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

Grade for Turning

Grade for Milling (Indexable)

Grade for Parting Off

Grade for Grooving