Material Group:
S - Superalloys (Heat resistant and Titanium)
Sub Group:
Titanium alloy
Hardness:
32.0 HRC
Tensile Strength:
1130 [N/mm^2]
Machinability:
20%

Machining Material Ti-6Al-4V (Grade 5)

Titanium Ti-6Al-4V (ASTM Grade 5) is an alpha-beta titanium alloy with 6% aluminum and 4% vanadium. It has a hardness of 32 HRC and a Machinability rating of 20%. It is the most widely used titanium alloy due to its excellent strength-to-weight ratio and superb corrosion resistance. About 70% of all the titanium usage in the industry is of Ti6Al4V (or its sub-grades)

Primary uses of Ti-6Al-4V (ASTM Grade 5):

  • Medical implants and prostheses.
  • Structural aerospace components.
  • Jet engine parts (In the cold section of the engine)
  • Marine and chemistry parts.

Machining Titanium Ti-6Al-4V is challenging because:

  • Very low heat conductivity leads to quick over-heating of the cutting edge.
  • High hardness of 32 HRC leads to premature wear.

Best practices for Machining Titanium Ti-6Al-4V:

  • Make sure your coolant is pointed to the cutting edge, and use a coolant pump with high flow and pressure rates.
  • Medium and Roughing: Use a cutting edge with aggressive rake angles and high relief angles to avoid tearing or smearing the titanium workpiece material, preferably ground and with a small honing size.
  • Finish operations: Use ground inserts/tools with sharp cutting edges and minimal honing size.
  • Supper-finish operations: Consider using cutting tools designed for aluminum (very sharp, polished, and without honing).

Summery:

  • Use inserts/tools with a very hard substrate and a very thin coating layer or uncoated inserts.
  • For detailed carbide grades recommendations, check the Below Chart, or use the Grades Wizrad.
  • Recommended Cutting speed range for turning at stable conditions is 230 - 300 [SFM] / 70 - 90 [m/min].
  • Recommended Cutting speed range for milling with stable clamping and short overhang is 160 - 230 [SFM] / 50 - 70 [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-4V (Grade 5)

    StandardName
    sae4906, 4920, 4928,
    dinTiAl6V4
    unsUNS R56400
    bsTA10 TA11 TA12
    anforT.A6V;AIR:9183
    js1TC4

    Chemical Composition for Material Ti-6Al-4V (Grade 5)

    ElementAmount
    Aluminum (Al)5.5-6.75%
    Vanadium (V)3.5-4.5%
    Iron (Fe)0.3%
    Carbon (C)0.1%

    Cutting Speeds Recomendations for Material Ti-6Al-4V (Grade 5)

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

    Appmm/minSFM
    Turning70-90230-300
    Milling50-70160-230
    Parting45-60150-200
    Grooving60-80200-260
    Drilling60-80200-260

    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-4V (Grade 5)

    * 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-4V (Grade 5)

    Honing Size:
    0.02-0.05 mm / 0.001-0.002"
    Rake Angle:
    13° -18°
    Land Angle:
    Neutral
    Land Width:
    0.10-0.20 mm / 0.004-0.008"
    Ground Insert:
    Recommended

    Learn more about carbide inserts Cutting-Edge Geometry Parameters.

    Subscribe to out Newsletter and Get the Free Machinability eBook
    Scroll to Top