TIMET TIMETAL® 7-4 Alpha-Beta Titanium (Ti-7Al-4Mo)

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TIMET TIMETAL® 7-4 Alpha-Beta Titanium (Ti-7Al-4Mo)
Categories:	Metal; Nonferrous Metal; Titanium Alloy; Alpha/Beta Titanium Alloy
Material Notes:	TIMETAL® 7-4 is an alpha-beta alloy with excellent creep resistance and higher strength than Ti-6Al-4V. It offers very good high temperature resistance up to 900°F (480°C). Data provided by TIMET.
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Physical Properties	Original Value	Comments

Density	4.48 g/cc	Typical

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	896 MPa	Forgings
	896 MPa	Rolled Bar
Tensile Strength, Yield	827 MPa @Strain 0.2 %	Forgings
	827 MPa @Strain 0.2 %	Rolled Bar
Elongation at Break	10 %	Forgings
	20 %	Rolled Bar
Reduction of Area	10 %	Forgings
	25 %	Rolled Bar
Modulus of Elasticity	111 GPa	Annealed
	116 GPa	Solution Treated + Aged
Fatigue Strength	80000 psi @Treatment Temp. 760 °C, # of Cycles 1.00e+6	Rotating Beam; Barstock Heat Treated 24 hours and air cooled
	82000 psi @Treatment Temp. 760 °C, # of Cycles 7.00e+6	Rotating Beam; Barstock Heat Treated 24 hours and air cooled
	82500 psi @Treatment Temp. 982 °C, # of Cycles 1.00e+6	Rotating Beam; Barstock Heat Treated 24 hours and AC + 24 hrs at 540°C and AC
	85000 psi @Treatment Temp. 760 °C, # of Cycles 1.00e+6	Rotating Beam; Barstock Heat Treated 24 hours and air cooled
	85000 psi @Treatment Temp. 982 °C, # of Cycles 1.00e+6	Rotating Beam; Barstock Heat Treated 24 hours and AC + 24 hrs at 540°C and AC
	90000 psi @Treatment Temp. 982 °C, # of Cycles 3.00e+6	Rotating Beam; Barstock Heat Treated 24 hours and AC + 24 hrs at 540°C and AC
	90000 psi @Treatment Temp. 760 °C, # of Cycles 140000	Rotating Beam; Barstock Heat Treated 24 hours and air cooled
	90000 psi @Treatment Temp. 982 °C, # of Cycles 1.10e+6	Rotating Beam; Barstock Heat Treated 24 hours and AC + 24 hrs at 540°C and AC
	95000 psi @Treatment Temp. 982 °C, # of Cycles 200000	Rotating Beam; Barstock Heat Treated 24 hours and AC + 24 hrs at 540°C and AC
	95000 psi @Treatment Temp. 760 °C, # of Cycles 200000	Rotating Beam; Barstock Heat Treated 24 hours and air cooled
	100000 psi @Treatment Temp. 760 °C, # of Cycles 50000	Rotating Beam; Barstock Heat Treated 24 hours and air cooled
	100000 psi @Treatment Temp. 982 °C, # of Cycles 140000	Rotating Beam; Barstock Heat Treated 24 hours and AC + 24 hrs at 540°C and AC
	105000 psi @Treatment Temp. 982 °C, # of Cycles 85000	Rotating Beam; Barstock Heat Treated 24 hours and AC + 24 hrs at 540°C and AC
	105000 psi @Treatment Temp. 760 °C, # of Cycles 45000	Rotating Beam; Barstock Heat Treated 24 hours and air cooled

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000170 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	9.70 µm/m-°C @Temperature 20.0 - 455 °C
Specific Heat Capacity	0.515 J/g-°C
Thermal Conductivity	6.100 W/m-K
Maximum Service Temperature, Air	480 °C
Beta Transus	1010 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	6.5 - 7.3 %	Nominal 6.90%
Carbon, C	<= 0.010 %
Hydrogen, H	<= 0.013 %
Iron, Fe	0.15 - 0.30 %	Nominal 0.20%
Molybdenum, Mo	3.5 - 4.5 %	Nominal 4.00%
Nitrogen, N	<= 0.050 %
Other, each	<= 0.10 %
Other, total	<= 0.30 %
Oxygen, O	0.16 - 0.20 %	Nominal 0.18%
Titanium, Ti	88.7 %	As Remainder

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Titanium Ti-7Al-4Mo Annealed

NTIME74 / 199547

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