Titanium Ti-6Al-6V-2Sn (Ti-6-6-2) STA 910C/540C

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. %

Material Notes:
Information provided by Allvac and the references. Solution Treated 910C 1 hour, Aged 540C for 6 hours. 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, Brinell411411 Estimated from Rockwell C.
Hardness, Knoop450450 Estimated from Rockwell C.
Hardness, Rockwell C4444 
Hardness, Vickers430430 Estimated from Rockwell C.
Tensile Strength, Ultimate1280 MPa186000 psi 
Tensile Strength, Yield1210 MPa175000 psi 
Elongation at Break10 %10 % 
Modulus of Elasticity117 GPa17000 ksi in tension.
Compressive Yield Strength1280 MPa186000 psi 
Notched Tensile Strength690 MPa100000 psi Kt (stress concentration factor) = 17
Ultimate Bearing Strength2240 MPa325000 psi e/D = 2
Bearing Yield Strength1790 MPa260000 psi e/D = 2
Poisson's Ratio0.320.32 
Charpy Impact9.5 J7.01 ft-lb V-notch
Fatigue Strength210 MPa30500 psi at 1E+7 cycles. Kt (stress concentration factor) = 4.0
Fatigue Strength690 MPa100000 psi 1E+7 cycles
Fracture Toughness24 MPa-m21.8 ksi-in KIC
Shear Modulus45 GPa6530 ksi 
Shear Strength760 MPa110000 psi Ultimate shear strength

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

Thermal Properties
CTE, linear 20C8.6 m/m-C4.78 in/in-F 20-100C
CTE, linear 250C9.4 m/m-C5.22 in/in-F Average over the range 20-315C
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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