Titanium Ti-3Al-2.5V, alpha annealed

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

Close Analogs: 3 other heat treatments of this alloy are in Matweb.

Key Words: Ti3Al2.5V, UNS R56320; ASTM Grade 9; Half 6-4; Tubing Alloy

Component   Wt. %

Material Notes:
Information provided by Allvac and the references. Allpha annealed.

Applications: Excellent cold formability, 20-50% higher tensile properties than CP titanium grades. Primarily used in aircraft hydraulic systems.

Physical PropertiesMetricEnglishComments
Density4.48 g/cc0.162 lb/in 

Mechanical Properties
Hardness, Brinell256256 Estimated from Rockwell C.
Hardness, Knoop278278 Estimated from Rockwell C.
Hardness, Rockwell C2424 
Hardness, Vickers280280 
Tensile Strength, Ultimate620 MPa89900 psi 
Tensile Strength, Yield500 MPa72500 psi 
Elongation at Break15 %15 % 
Modulus of Elasticity100 GPa14500 ksi In Tension
Compressive Yield Strength690 MPa100000 psi 
Notched Tensile Strength790 MPa115000 psi Kt (stress concentration factor) = 6.3
Poisson's Ratio0.30.3 
Charpy Impact86 J63.4 ft-lb V-notch
Fatigue Strength170 MPa24700 psi at 1E+7 cycles. Kt (stress concentration factor) = 1.8
Fatigue Strength280 MPa40600 psi 50,000 cycles. Kt (stress concentration factor) = 1.8
Fatigue Strength280 MPa40600 psi 1E+7 cycles, Unnotched
Fatigue Strength380 MPa55100 psi 40,000 cycles, Unnotched
Fracture Toughness100 MPa-m91 ksi-in kJ/m for J(IC)
Shear Modulus44 GPa6380 ksi 

Electrical Properties
Electrical Resistivity0.000127 ohm-cm0.000127 ohm-cm 

Thermal Properties
CTE, linear 20C9.61 m/m-C5.34 in/in-F 20-95C
CTE, linear 250C9.86 m/m-C5.48 in/in-F 20-315C; 9.67 in range 20-205C
CTE, linear 500C9.97 m/m-C5.54 in/in-F Average over the range 20-540C
Specific Heat Capacity0.525 J/g-C0.125 BTU/lb-F Typical value for titanium alloys.
Thermal Conductivity8.3 W/m-K57.6 BTU-in/hr-ft-F Value at 315C is 11.8 W/m-C
Melting PointMax 1700 CMax 3090 F Liquidus
Liquidus1700 C3090 F 
Beta Transus935 C1720 F 

References for this datasheet.

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