General Information:
Material GroupS - Superalloys (Heat resistant and Titanium)
Sub-GroupTitanium alloy
Hardne28.0 HRC
Tensile Strength900 [N/mm^2]
Machinability24%

Machining Material Ti-6Al-4Zr-2Mo-2Sn-0.2Si

Material Ti-6Al-4Zr-2Mo-2Sn-0.2Si is a titanium alloy with a hardness of 28 HRC and a machinability rating of 24%.

Titanium alloys such as Ti-6Al-4Zr-2Mo-2Sn-0.2Si are used in mechanical components for two main reasons:

  • It has an excellent strength-to-weight ratio. On the one hand, it is almost as light as aluminum, and on the other hand, it has a higher strength than most steel alloys.
  • It has superb corrosion resistance.

The main challenges of machining Ti-6Al-4Zr-2Mo-2Sn-0.2Si are:

  • Ti-6Al-4Zr-2Mo-2Sn-0.2Si has very low heat conductivity. It causes heat generating from the cut to transfer mainly to the cutting tool instead of flowing to the chips and workpiece.
  • It has high flexibility, thus bending easily by the cutting forces.

Tip for machining Ti-6Al-4Zr-2Mo-2Sn-0.2Si:

  • Use a positive cutting edge in medium/roughing operation, preferably gound with a small honing size.
  • In finish operations, use only ground inserts/tools with sharp cutting edges and minimal honing size.
  • On supper-finish applications, you can also use cutting tools that are designed for aluminum without honing.
  • On small diameter parts, on a workpiece with thin walls, or poorly clamped workpiece, be gentle with your depth of cut and feed rate to reduce the cutting force.

Summery:

  • For detailed carbide grades recommendations, check the Below Chart, or use the Grades Wizrad.
  • Recommended Cutting speed range for turning at stable conditions is 260 - 360 [SFM] / 80 - 110 [m/min].
  • Recommended Cutting speed range for milling with stable clamping and short overhang is 200 - 280 [SFM] / 60 - 85 [m/min]
  • For detailed cutting speed recomendations, check the Below Table, or use our Speed and Feed Calculator.

  • Equivalent International Designations for Material Ti-6Al-4Zr-2Mo-2Sn-0.2Si

    StandardName
    sae4919, 4975, 4976
    dinTiAl6Zr4Mo2Sn2
    unsUNS R54620 modified

    Chemical Composition for Material Ti-6Al-4Zr-2Mo-2Sn-0.2Si

    ElementAmount
    Aluminum (Al)6%
    Molybdenum (Mo)2%
    Silicon (Si)0.12%
    Carbon (C)0.1%
    Iron (Fe)0.05%

    Cutting Speeds Recomendations for Material Ti-6Al-4Zr-2Mo-2Sn-0.2Si

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

    ApplicationVc (m/min)Vc (SFM)
    Turning80-110260-360
    Milling60-85200-280
    Parting50-70160-230
    Grooving70-95230-310
    Drilling70-95230-310

    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 Material Ti-6Al-4Zr-2Mo-2Sn-0.2Si

    * 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 Material Ti-6Al-4Zr-2Mo-2Sn-0.2Si

    Honing Siz0.02-0.05 mm / 0.001-0.002"
    Rake Angl13° -18°
    Land AnglNeutral
    Land Widt0.10-0.20 mm / 0.004-0.008"
    Ground InserRecommended

    Learn more about carbide inserts Cutting-Edge Geometry Parameters.

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