Machining DataSheet for

General Information:
Material GroupP - Steel
Sub-GroupTool Steel
Tensile Strength780-1080 [N/mm^2]
Machinability Range23% - 55%

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Equivalent International Designations for Steel A128.75

Standard Name
saeA12875
wnr1.3401
dinGX120Mn12
bsBW10
ss2183
anforZ120M12
uniXG120Mn12
unfX120Mn12

Chemical Composition for Steel A128.75

Sorry, Not Availble for this Material


Cutting Speeds Recomendations for Tool Steel and High Alloy Steel

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

ApplicationVc (m/min)Vc (SFM)
Turning100-240330-790
Milling65-150210-490
Parting50-115160-380
Grooving55-135180-440
Drilling40-95130-310

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 Steel A128.75

* 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 Steel A128.75

Honing Size:0.05-0.08 mm / 0.002-0.003"
Rake Angle:11° -13°
Land Angle:Positive
Land Width:0.20-0.30 mm / 0.008-0.012"

Learn more about carbide inserts Cutting-Edge Geometry Parameters.

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