Titanium Ti-3Al-2.5V (Grade 9), alpha annealed

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Titanium Ti-3Al-2.5V (Grade 9), alpha annealed
Categories:	Metal; Nonferrous Metal; Titanium Alloy; Alpha/Near Alpha Titanium Alloy
Material Notes:	Information provided by Allvac and the references. Alpha annealed. High strength-to-weight ratio, lighter than stainless steel. Good corrosion resistance in mildly reducing to highly oxidizing media Applications: Excellent cold formability, 20-50% higher tensile properties than CP titanium grades. Primarily used in aircraft hydraulic systems. Forms typically available: Sheet, strip, foil and tubing. 3 other heat treatments of this alloy are in MatWeb.
Key Words:	Ti3Al2.5V, UNS R56320; ASTM Grade 9; Half 6-4; Tubing Alloy
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Physical Properties	Original Value	Comments

Density	4.48 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	256	Estimated from Rockwell C.
Hardness, Knoop	278	Estimated from Rockwell C.
Hardness, Rockwell C	24
Hardness, Vickers	280
Tensile Strength, Ultimate	620 MPa
Tensile Strength, Yield	500 MPa
Elongation at Break	15 %
Tensile Modulus	100 GPa
	80.0 GPa @Temperature 230 °C
Compressive Yield Strength	690 MPa
Notched Tensile Strength	790 MPa	K_t (stress concentration factor) = 6.3
Poissons Ratio	0.30
Fatigue Strength	170 MPa @# of Cycles 1.00e+7	K_t (stress concentration factor) = 1.8
	280 MPa @# of Cycles 50000	K_t (stress concentration factor) = 1.8
	280 MPa @# of Cycles 1.00e+7	unnotched
	380 MPa @# of Cycles 40000	unnotched
Fracture Toughness	100 MPa-m½	kJ/m² for J(IC)
Shear Modulus	44.0 GPa
Charpy Impact	86.0 J	V-notch

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000127 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	9.61 µm/m-°C @Temperature 20.0 - 95.0 °C
	9.67 µm/m-°C @Temperature 20.0 - 205 °C
	9.86 µm/m-°C @Temperature 20.0 - 315 °C
	9.97 µm/m-°C @Temperature 20.0 - 540 °C	average
Specific Heat Capacity	0.525 J/g-°C	Typical value for titanium alloys.
Thermal Conductivity	8.30 W/m-K @Temperature 23.0 °C
	11.8 W/m-K @Temperature 315 °C
Melting Point	<= 1700 °C
Solidus	1704 °C
Liquidus	1700 °C
Beta Transus	935 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	2.5 - 3.5 %
Carbon, C	<= 0.050 %
Hydrogen, H	<= 0.015 %
Iron, Fe	<= 0.20 %
Nitrogen, N	<= 0.030 %
Other, each	<= 0.050 %
Other, total	<= 0.30 %
Oxygen, O	<= 0.15 %
Titanium, Ti	92.755 - 95.5 %	As Balance; Elemental Composition per ASTM B265
Vanadium, V	2.0 - 3.0 %

References for this datasheet.

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MTA321 / 14123

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