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


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. %
Sn2 
Ti86 
V6 

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

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

Physical PropertiesMetricEnglishComments
Density4.54 g/cc0.164 lb/in 

Mechanical Properties
Hardness, Brinell389389 Estimated from Rockwell C.
Hardness, Knoop425425 Estimated from Rockwell C.
Hardness, Rockwell C4242 
Hardness, Vickers407407 Estimated from Rockwell C.
Tensile Strength, Ultimate1100 MPa160000 psi 
Tensile Strength, Yield1035 MPa150000 psi 
Elongation at Break12 %12 % 
Modulus of Elasticity112 GPa16200 ksi 
Poisson's Ratio0.320.32 
Fatigue Strength1070 MPa155000 psi 10,000 cycles, Unnotched
Fatigue Strength190 MPa27600 psi 1E+7 cycles, Notched
Fatigue Strength540 MPa78300 psi 10,000 cycles. Kt (stress concentration factor) = 3.9
Fatigue Strength680 MPa98600 psi Unnotched Sample 10,000,000 Cycles
Fracture Toughness60 MPa-m54.6 ksi-in Plane-Strain
Shear Modulus45 GPa6530 ksi 

Electrical Properties
Electrical Resistivity0.000157 ohm-cm0.000157 ohm-cm 

Thermal Properties
CTE, linear 20C9 m/m-C5 in/in-F 
CTE, linear 250C9.4 m/m-C5.22 in/in-F Average over the range 20-315C
CTE, linear 500C9.5 m/m-C5.28 in/in-F Average over the range 20-540C
Specific Heat Capacity0.67 J/g-C0.16 BTU/lb-F 
Thermal Conductivity6.6 W/m-K45.8 BTU-in/hr-ft-F 
Melting Point1627 - 1649 C2960 - 3000 F 
Solidus1627 C2960 F 
Liquidus1649 C3000 F 
Maximum Service Temperature, Air315 C599 F Subject to Tensile Embrittlement
Beta Transus945 C1730 F 

References for this datasheet.


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