Machining DataSheet for

General Information:
Material GroupP - Steel
Sub-GroupTool Steel
Tensile Strength750-800 [N/mm^2]
Machinability Range23% - 55%

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Equivalent International Designations for Steel S1

Standard Name
saeS1
wnr1.2542
din45WCrV7
bsBS1
ss2710
anfor55WC20
uni45WCrV8KU
unf45WCrSi8

Chemical Composition for Steel S1

Element Amount
Tungsten (W)1.50-3.00%
Chromium (Cr)1.00-1.80%
Silicon (Si)0.15-1.20%
Molybdenum (Mo)0.50 max%
Carbon (C)0.40-0.55%
Nickel (Ni)0.30 max%
Manganese (Mn)0.10-0.40%
Vanadium (V)0.15-0.30%

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 S1

* 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 S1

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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