Alloy Information Report for Titanium Ti-4Al-3Mo-1v

General Characteristics of Titanium Ti-4Al-3Mo-1v

Titanium Ti-4Al-3Mo-IV is a heat-treatable sheet alloy that offers exceptional strength, creep and stability up to 900°F (482°C). The alloy will not corrode from salt or atmospheric environments and provides room temperature tensile strength of 185000psi minimum

Chemical Composition of Titanium Ti-4Al-3Mo-1v

Aluminum 3.75-4.75
Molybdenum 2.50-3.5
Vanadium 0.75-1.25
Nitrogen 0.05 max
Hydrogen 0.15 max
Iron 0.25 max
Carbon 0.08 max
Titanium balance

Heat Treatment of Titanium Ti-4Al-3Mo-1v

Anneal by holding at 1300° to 1400°F (704° to 760°C) for 30 minutes before gradual cooling
For stress relief, heat at 900° to 1100°F (482° to 593°C) before air cooling
For solution treatment, hold at 1600° to 1650°F (871° to 899°C) for 15-30 minutes, then water quench
For aging treatment, follow solution treatment by reheating and holding at 925°F (496°C) for 6-12 hours

Applications of Titanium Ti-4Al-3Mo-1v

Aircraft industry, including internal structures, stiffeners and skins on airframes

Machinability of Titanium Ti-4Al-3Mo-1v

Recommended:

Rigid machine setups
Good coolant
Sharp tools
Heavy feeds
Slow speeds

Straight tungsten carbide grades and cobalt high speed steels perform satisfactorily
Use water-based or chemical cutting fluids

Workability of Titanium Ti-4Al-3Mo-1v

Aged and solution-treated sheets can be bent, wrapped and jogged at room temperature
Use annealed alloy when performing extensive hot forming above 1100°F (593°C)
Achieve top formability and smallest bend radius with solution-treated alloy
Aged and solution-treated alloy appropriate for minimal forming

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