Titanium Grade 3, Annealed

Subcategory: Metal; Nonferrous Metal; Titanium Alloy; Unalloyed/Modified Titanium

Close Analogs: Titanium Grades 1,2,3,4,7,11,and 12 are all considered unalloyed and have similar mechanical properties.

Key Words: ASTM Grade 3; UNS R50550, CP titanium, C.P. titanium alloy

Component   Wt. %
CMax 0.1 
FeMax 0.3 
HMax 0.015 
N Max 0.05 
OMax 0.35 

Material Notes:
Information provided by Allvac and the references.

Applications: Airframe skin, heat exchangers, cryogenic vessels, components for CPI equipment, condenser tubing, exhaust pipe shrouds. Sample was annealed 2 hr at 700C.

Physical PropertiesMetricEnglishComments
Density4.5 g/cc0.163 lb/in 

Mechanical Properties
Hardness, Brinell266266 Estimated from Rockwell C.
Hardness, Knoop289289 Estimated from Rockwell C.
Hardness, Rockwell C2626 
Hardness, Vickers280280 Estimated from Rockwell C.
Tensile Strength, Ultimate520 MPa75400 psi 
Tensile Strength, Yield450 MPa65300 psi 
Elongation at Break25 %25 % 
Modulus of Elasticity104 GPa15100 ksi in tension.
Notched Tensile Strength790 MPa115000 psi Kt (stress concentration factor) = 3.0
Ultimate Bearing Strength920 MPa133000 psi 
Bearing Yield Strength650 MPa94300 psi 
Poisson's Ratio0.340.34 
Charpy Impact27 J19.9 ft-lb V-notch
Fatigue Strength250 MPa36300 psi at 1E+7 cycles. Kt (stress concentration factor) = 2.7
Fatigue Strength340 MPa49300 psi 1E+7 cycles, Unnotched
Shear Modulus39 GPa5660 ksi 

Electrical Properties
Electrical Resistivity5.4e-005 ohm-cm5.4e-005 ohm-cm 

Thermal Properties
Heat of Fusion325 J/g140 BTU/lb High Purity Ti.
CTE, linear 20C8.6 m/m-C4.78 in/in-F 20-93C
CTE, linear 250C9.2 m/m-C5.11 in/in-F Unspecified heat treatment. Average over the range 0-315C
Specific Heat Capacity0.523 J/g-C0.125 BTU/lb-F 
Thermal Conductivity16.4 W/m-K114 BTU-in/hr-ft-F 
Melting PointMax 1660 CMax 3020 F Liquidus
Liquidus1660 C3020 F 
Beta Transus920 C1690 F 

Optical Properties
Emissivity (0-1)0.30.3 High purity Ti at 710C
Reflection Coefficient, Visible (0-1)0.560.56 High purity Ti; visible light.

References for this datasheet.

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