General Information for Material Ti-99.7 (Grade 3)
Material Group |
S - Superalloys (Heat resistant and Titanium) |
Sub-Group |
Superalloy |
Hardness |
80.0 HRB |
Tensile Strength |
510[N/mm^2] |
Machinability Range |
35% |
MACHINABILITY OF Ti-99.7 (Grade 3) MATERIAL
Material Ti-99.7 (Grade 3) is a pure titanium material with a machinability rating of 35%.
Pure titanium grades exhibit excellent corrosion resistance in environments that include: calcium chloride, cupric chloride, various concentrations of acetic acid, and high-temperature seawater.
However, they lack strength and hardness when compared to titanium alloys such as Ti-6Al-4V. Therefore, they are used in oil & gas components, reaction and pressure vessels, tubing systems and heat exchangers, or any other application where corrosion resistance and chemical stability are required but high strength is not needed.
Pure titanium is very ductile and needs to be machined with precision-ground and sharp cutting edges. The cutting tool needs to be either uncoated or have a very thin coating layer to preserve the sharpness of the cutting edge.
SUMMARY:
For detailed carbide grades recommendations, check the table below.
Recommended cutting speed range for turning at stable conditions is 390 - 520 [SFM] / 120 - 160 [m/min].
Recommended cutting speed range for milling with stable clamping and short overhang is 300 - 390 [SFM] / 90 - 120 [m/min].
For detailed cutting speed recommendations, check the table below.
Equivalent International Designations for Material Ti-99.7 (Grade 3)
Standard |
Name |
SAE |
Grade 3 B381F2 |
DIN |
Ti-99.7 |
UNS |
UNS R50400 |
BS |
TA2.5 |
ANFOR |
AlR:9182T40 |
Chemical Composition for Material Ti-99.7 (Grade 3)
Element |
Amount |
Carbon (C) |
0.1% |
Iron (Fe) |
0.3% |
Cutting Speeds Recomendations for Material Ti-99.7 (Grade 3)
Application |
Vc (m/min) |
Vc (SFM) |
Turning |
120-160 |
390-520 |
Milling |
90-120 |
300-390 |
Parting |
75-100 |
250-330 |
Grooving |
105-140 |
340-460 |
Drilling |
105-140 |
340-460 |
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.
Recommended Carbide Grades for Material Ti-99.7 (Grade 3)
Grade for Milling (Indexable)
Recommended Insert Cutting Edge Geometry for Material Ti-99.7 (Grade 3)
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 |