Titanium Ti-6Al-6V-2Sn (Ti-6-6-2) STA 870°C/565°C

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Titanium Ti-6Al-6V-2Sn (Ti-6-6-2) STA 870°C/565°C
Categories:	Metal; Nonferrous Metal; Titanium Alloy; Alpha/Beta Titanium Alloy
Material Notes:	Information provided by Allvac and the references. Solution Treated 870ºC, Aged 565ºC. Alpha-Beta alloy. Characteristics: Good corrosion resistance. Higher strength, lower fracture toughness and lower fatigue properties when compared to Ti-6Al-4V Applications: Airframes, jet engines, rocket engine cases, nuclear reactor components, ordnance components. Forms available: Billet, bar, plate, sheet and extrusions. 2 other heat treatments of this alloy are listed in MatWeb.
Key Words:	Ti-662; Ti-6-6-2; UNS R56620
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Physical Properties	Original Value	Comments

Density	4.54 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	389	Estimated from Rockwell C.
Hardness, Knoop	425	Estimated from Rockwell C.
Hardness, Rockwell C	42
Hardness, Vickers	407	Estimated from Rockwell C.
Tensile Strength	900 MPa @Temperature 300 °C
	930 MPa @Temperature 200 °C
	980 MPa @Temperature 100 °C
Tensile Strength, Ultimate	1100 MPa
Tensile Strength, Yield	1035 MPa
	760 MPa @Temperature 300 °C
	820 MPa @Temperature 200 °C
	880 MPa @Temperature 100 °C
Elongation at Break	12 %
	15 % @Temperature 100 °C
	17 % @Temperature 200 °C
	18 % @Temperature 300 °C
Reduction of Area	18 % @Temperature 23.0 °C
	24 % @Temperature 100 °C
	39 % @Temperature 200 °C
	42 % @Temperature 300 °C
Creep Strength	770 MPa @Temperature 315 °C, Time >=1.80e+6 sec	strain 0.5%
	800 MPa @Temperature 315 °C, Time >=360000 sec	strain 0.5%
	800 MPa @Temperature 315 °C, Time >=1.80e+6 sec	strain 1%
	820 MPa @Temperature 315 °C, Time >=360000 sec	strain 1%
Modulus of Elasticity	112 GPa
Tensile Modulus	101 GPa @Temperature 300 °C
	106 GPa @Temperature 200 °C
	110 GPa @Temperature 100 °C
Poissons Ratio	0.32
Fatigue Strength	190 MPa @# of Cycles 1.00e+7	notched
	540 MPa @# of Cycles 10000	K_t (stress concentration factor) = 3.9
	680 MPa @# of Cycles 1.00e+7	unnotched sample
	1070 MPa @# of Cycles 10000	unnotched
Fracture Toughness	60.0 MPa-m½	Plane-Strain
	60.0 MPa-m½ @Temperature 22.0 °C
	99.0 MPa-m½ @Temperature 93.0 °C
	143 MPa-m½ @Temperature 205 °C
Shear Modulus	45.0 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000157 ohm-cm
Magnetic Permeability	1.0	non-magnetic

Thermal Properties	Original Value	Comments
CTE, linear	9.00 µm/m-°C @Temperature 20.0 °C
	9.40 µm/m-°C @Temperature 20.0 - 315 °C	average
	9.50 µm/m-°C @Temperature 20.0 - 540 °C	average
Specific Heat Capacity	0.670 J/g-°C
	0.687 J/g-°C @Temperature 260 °C
	0.712 J/g-°C @Temperature 480 °C
Thermal Conductivity	6.60 W/m-K
	8.12 W/m-K @Temperature 205 °C
	11.9 W/m-K @Temperature 425 °C
Melting Point	1627 - 1649 °C
Solidus	1627 °C
Liquidus	1649 °C
Maximum Service Temperature, Air	315 °C	Subject to Tensile Embrittlement
Beta Transus	945 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	5.0 - 6.0 %
Carbon, C	<= 0.050 %
Copper, Cu	0.35 - 1.0 %
Hydrogen, H	<= 0.015 %
Iron, Fe	0.35 - 1.0 %
Nitrogen, N	<= 0.040 %
Other, each	<= 0.10 %
Other, total	<= 0.30 %
Oxygen, O	<= 0.20 %
Tin, Sn	1.5 - 2.5 %
Titanium, Ti	82.895 - 87.8 %	As Balance; Elemental Composition per ASTM B265
Vanadium, V	5.0 - 6.0 %

Descriptive Properties
Crystal Structure	bcc	Beta
	cph	Alpha

References for this datasheet.

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MTP662 / 14245

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