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

Subcategory: Alpha/Beta Titanium Alloy; Metal; Nonferrous Metal; Titanium Alloy

Close Analogs: 2 other heat treatments of this alloy are listed in MatWeb.

Key Words: Ti-662; Ti-6-6-2; UNS R56620

Component    Wt. % Sn 2   Ti 86   V 6

Material Notes:
Information provided by Allvac and the references. Solution Treated 870ºC, Aged 565ºC. Alpha-Beta alloy.

Applications: Airframes, jet engines, rocket engine cases, nuclear reactor components, ordnance components.

Physical Properties	Metric	English	Comments
Density	4.54 g/cc	0.164 lb/in³
Mechanical Properties
Hardness, Brinell	389	389	Estimated from Rockwell C.
Hardness, Knoop	425	425	Estimated from Rockwell C.
Hardness, Rockwell C	42	42
Hardness, Vickers	407	407	Estimated from Rockwell C.
Tensile Strength, Ultimate	1100 MPa	160000 psi
Tensile Strength, Yield	1035 MPa	150000 psi
Elongation at Break	12 %	12 %
Modulus of Elasticity	112 GPa	16200 ksi
Poisson's Ratio	0.32	0.32
Fatigue Strength	1070 MPa	155000 psi	10,000 cycles, Unnotched
Fatigue Strength	190 MPa	27600 psi	1E+7 cycles, Notched
Fatigue Strength	540 MPa	78300 psi	10,000 cycles. Kt (stress concentration factor) = 3.9
Fatigue Strength	680 MPa	98600 psi	Unnotched Sample 10,000,000 Cycles
Fracture Toughness	60 MPa-m½	54.6 ksi-in½	Plane-Strain
Shear Modulus	45 GPa	6530 ksi
Electrical Properties
Electrical Resistivity	0.000157 ohm-cm	0.000157 ohm-cm
Thermal Properties
CTE, linear 20°C	9 µm/m-°C	5 µin/in-°F
CTE, linear 250°C	9.4 µm/m-°C	5.22 µin/in-°F	Average over the range 20-315ºC
CTE, linear 500°C	9.5 µm/m-°C	5.28 µin/in-°F	Average over the range 20-540ºC
Specific Heat Capacity	0.67 J/g-°C	0.16 BTU/lb-°F
Thermal Conductivity	6.6 W/m-K	45.8 BTU-in/hr-ft²-°F
Melting Point	1627 - 1649 °C	2960 - 3000 °F
Solidus	1627 °C	2960 °F
Liquidus	1649 °C	3000 °F
Maximum Service Temperature, Air	315 °C	599 °F	Subject to Tensile Embrittlement
Beta Transus	945 °C	1730 °F

References for this datasheet.