Machining Steel H11

Steel H11 is a Tool Steel (High-alloy steel) that has on top of the 0.4% of carbon an additional 7.7% of manganese, chromium, nickel, and molybdenum. (See details in the below table). Steel H11 has a machinability rating of 55%.

Steel H11 belongs to the "H series" of tool steels. They are classified as Chromium hot-work steels and contain medium carbon content (around 0.4%) and chromium content of around 5%. Tool Steels in this series (H10-H19) have a machinability rating of 50-60%. They are the easiest to machine group of tool steels and are used when higher strength and/or hardenability are required that cannot be achieved with Low Aloy steel.

You can find here a list of machinability Ratings for different Tool Steels.


  • For turning operations on Steel H11, it is best to use inserts with thick CVD coating and medium hardness. For milling, any all-around carbide grade is suitable.
  • For detailed carbide grades recommendations, check the Below Chart, or use the Grades Wizrad.
  • Recommended Cutting speed range for turning at stable conditions is 670 - 900 [SFM] / 205 - 275 [m/min].
  • Recommended Cutting speed range for milling with stable clamping and short overhang is 410 - 560 [SFM] / 125 - 170 [m/min]
  • For detailed cutting speed recomendations, check the Below Table, or use our Speed and Feed Calculator.

  • Equivalent International Designations for Steel H11


    Chemical Composition for Steel H11

    Chromium (Cr)4.75-5.50%
    Molybdenum (Mo)1.10-1.60%
    Silicon (Si)0.80-1.20%
    Vanadium (V)0.30- 0.60%
    Carbon (C)0.33-0.43%
    Manganese (Mn)0.20-0.50%
    Nickel (Ni)0.30 max%

    Cutting Speeds Recomendations for Steel H11

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

    ApplicationVc (m/min)Vc (SFM)

    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 H11

    * 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 Steel H11

    Honing Siz0.05-0.08 mm / 0.002-0.003"
    Rake Angl11° -13°
    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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