Titanium Ti-5Al-2.5Sn


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

Close Analogs: 1 other heat treatment of this alloy is in Matweb.

Key Words: UNS R54520; Ti-5-2.5

Component   Wt. %
Al5 
FeMax 0.5 
OMax 0.2 
Sn2.5 
Ti92.5 

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

Mechanical Properties
Hardness, Brinell320320 
Hardness, Knoop363363 Estimated from Rockwell C.
Hardness, Rockwell C3636 
Hardness, Vickers349349 Estimated from Rockwell C.
Tensile Strength, Ultimate861 MPa125000 psi 
Tensile Strength, Yield827 MPa120000 psi 
Elongation at Break15 %15 % 
Modulus of Elasticity110 - 125 GPa16000 - 18100 ksi 
Compressive Yield Strength830 MPa120000 psi 
Notched Tensile Strength1240 MPa180000 psi Kt (stress concentration factor) = 6.5
Ultimate Bearing Strength1760 MPa255000 psi e/D = 2
Bearing Yield Strength1340 MPa194000 psi e/D = 2
Poisson's Ratio0.310.31 Typical for alpha titanium alloy.
Charpy Impact24 J17.7 ft-lb V-notch
Fatigue Strength290 MPa42100 psi at 1E+7 cycles. Kt (stress concentration factor) = 2.4
Fatigue Strength380 MPa55100 psi 1E+7 cycles, Unnotched
Fatigue Strength390 MPa56600 psi at 1E+5 cycles. Kt (stress concentration factor) = 2.4
Fatigue Strength440 MPa63800 psi Unnotched, 1,000,000 Cycles
Fatigue Strength530 MPa76900 psi 1E+5 cycles, Unnotched
Fracture Toughness33 MPa-m30 ksi-in K(ISCC)
Fracture Toughness96 MPa-m87.4 ksi-in K(IC)
Shear Modulus48 GPa6960 ksi 
Shear Strength520 MPa75400 psi Ultimate shear strength

Electrical Properties
Electrical Resistivity0.00016 ohm-cm0.00016 ohm-cm 

Thermal Properties
CTE, linear 20C9.4 m/m-C5.22 in/in-F 0-100C
CTE, linear 250C9.5 m/m-C5.28 in/in-F Average over the range 0-315C; unspecified heat treatment.
CTE, linear 500C9.7 m/m-C5.39 in/in-F Average over the range 0-650C
Specific Heat Capacity0.53 J/g-C0.127 BTU/lb-F 0.674 J/g-C at 315C
Thermal Conductivity7.8 W/m-K54.1 BTU-in/hr-ft-F 10.9 W/m-C at 315C
Melting PointMax 1590 CMax 2890 F Liquidus
Liquidus1590 C2890 F 
Beta Transus1040 - 1090 C1900 - 1990 F 

References for this datasheet.


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