Machining DataSheet for

General Information:
Material GroupM - Stainless Steel
Sub-GroupFerritic Stainless Steel
Hardness80.0 HRB
Tensile Strength500 [N/mm^2]
Machinability Range35% - 90%

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Equivalent International Designations for Stainless Steel 444

Standard Name
sae444
wnr1.4521
unsUNS S44400
ss2326
anforZ3CDT18 02

Chemical Composition for Stainless Steel 444

Element Amount
Chromium (Cr)18.2%
Molybdenum (Mo)1.9%
Nickel (Ni)0.5%
Silicon (Si)0.45%
Manganese (Mn)0.3%
Titanium (Ti)0.13%
Phosphorus (P)0.03%
Carbon (C)0.013%
Sulfur (S)0.002%

Cutting Speeds Recomendations for Stainless steel - Ferritic

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

ApplicationVc (m/min)Vc (SFM)
Turning155-395510-1300
Milling95-250310-820
Parting60-160200-520
Grooving90-235300-770
Drilling45-115150-380

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 Stainless Steel 444

* 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 Stainless Steel 444

Honing Size:0.03-0.05 mm / 0.001-0.002"
Rake Angle:9° -11°
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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