Titanium Ti-5Al-2.5Sn, ELI, Annealed

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Titanium Ti-5Al-2.5Sn, ELI, Annealed
Categories:	Metal; Nonferrous Metal; Titanium Alloy; Alpha/Near Alpha Titanium Alloy
Material Notes:	Annealed 700-870°C for 15 min-4 hr. Characteristics: High service temperatures (480°C), Intermediate strength, Improved high temperature strength compared to unalloyed Ti, Excellent weld fabricability, Oxidation resistance, Microstructure stability, Nonheat-treatable (contains only iron impurity as a beta-stablizing element) Applications: Gas turbine engine casings and rings, Aerospace structural members, Chemical processing equipment Microstructure: Equiaxed alpha - when treated/worked below beta transus, Acicular alpha - when treated/worked above beta transus, Beta (bcc) - small amounts may be present Forms typically available: Billet, bar, rod, plate, sheet, extrusions, and wire. 1 other heat treatment of this alloy is in MatWeb.
Key Words:	UNS R54521 (ELI); Ti-5-2.5
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Physical Properties	Metric	English	Comments

Density	4.48 g/cc	0.162 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	311	311	Estimated from Rockwell C.
Hardness, Knoop	337	337	Estimated from Rockwell C.
Hardness, Rockwell C	33	33
Hardness, Vickers	325	325	Estimated from Rockwell C.
Tensile Strength, Ultimate	775 MPa	112000 psi
Tensile Strength, Yield	720 MPa	104000 psi
Elongation at Break	18 %	18 %
Creep Strength	276 MPa @Temperature 204 °C, Time >=3.60e+6 sec	40000 psi @Temperature 399 °F, Time >=1000 hour	strain 0.2%
Tensile Modulus	110 GPa	16000 ksi
Notched Tensile Strength	1080 MPa	157000 psi	K_t (stress concentration factor) = 6.3
Poissons Ratio	0.31	0.31	Typical for alpha titanium alloy.
Fatigue Strength	410 MPa @# of Cycles 1.00e+7	59500 psi @# of Cycles 1.00e+7
Fracture Toughness	88.0 MPa-m½	80.1 ksi-in½	K_IC
Shear Modulus	48.0 GPa	6960 ksi	Standard Ti-5-2.5
Charpy Impact	44.0 J	32.5 ft-lb	V-notch

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.000160 ohm-cm	0.000160 ohm-cm

Thermal Properties	Metric	English	Comments
CTE, linear	9.40 µm/m-°C @Temperature 0.000 - 100 °C	5.22 µin/in-°F @Temperature 32.0 - 212 °F
	9.50 µm/m-°C @Temperature 0.000 - 315 °C	5.28 µin/in-°F @Temperature 32.0 - 599 °F	average
Specific Heat Capacity	0.530 J/g-°C @Temperature 20.0 °C	0.127 BTU/lb-°F @Temperature 68.0 °F
	0.674 J/g-°C @Temperature 315 °C	0.161 BTU/lb-°F @Temperature 599 °F
Thermal Conductivity	7.80 W/m-K	54.1 BTU-in/hr-ft²-°F
Melting Point	<= 1590 °C	<= 2890 °F
Liquidus	1590 °C	2890 °F
Maximum Service Temperature, Air	480 °C	896 °F
Beta Transus	1040 - 1090 °C	1900 - 1990 °F

Component Elements Properties	Metric	English	Comments
Aluminum, Al	5.0 %	5.0 %
Iron, Fe	<= 0.25 %	<= 0.25 %
Oxygen, O	<= 0.12 %	<= 0.12 %
Tin, Sn	2.5 %	2.5 %
Titanium, Ti	92.5 %	92.5 %

References for this datasheet.

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MTA521 / 14128

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