Machining DataSheet for

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)

Standard	Name
sae	4906, 4920, 4928,
din	TiAl6V4
uns	UNS R56400
bs	TA10 TA11 TA12
anfor	T.A6V;AIR:9183
js1	TC4

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

Element	Amount
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!

App	mm/min	SFM
Turning	70-90	230-300
Milling	50-70	160-230
Parting	45-60	150-200
Grooving	60-80	200-260
Drilling	60-80	200-260

Recommended Carbide Grades for Material Ti-6Al-4V (Grade 5)

• Turning
• Parting Off
• Grooving
• Milling Indexable

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.