General Information:
Material GroupM - Stainless Steel
Sub-GroupMartensitic Stainless Steel
Hardne80.0 HRB
Tensile Strength500 [N/mm^2]
Machinability Range35% - 90%

Equivalent International Designations for Stainless Steel 444

StandardName
sae444
wnr1.4521
unsUNS S44400
ss2326
anforZ3CDT18 02


Chemical Composition for Stainless Steel 444

ElementAmount
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 - Martensitic

* 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 don't 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 Siz0.03-0.05 mm / 0.001-0.002"
Rake Angl9° -11°
Land AnglPositive
Land Widt0.20-0.30 mm / 0.008-0.012"

Learn more about carbide inserts Cutting-Edge Geometry Parameters.

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