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Titanium Grade 12, 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: UNS R53400; ASTM Grade 12, titanium alloy

Component   Wt. %
Mo0.3 
Ni0.8 
Ti98.9 

Material Notes:
Addition of 0.3% Mo and 0.8% Ni to titanium increases corrosion resistance at a lower cost than Pd (see Ti Grades 7 and 11). Sample was annealed 20 min. at 815°C and 5 min. at 788°C.

Physical PropertiesOriginal ValueComments
Density4.5 g/cc 

Mechanical Properties
Tensile Strength, Ultimate620 MPa 
Tensile Strength, Yield480 MPa 
Elongation at Break23 % 
Modulus of Elasticity103 GPa in tension.
Notched Tensile Strength620 MPa Kt (stress concentration factor) = 5.3
Poisson's Ratio0.28 
Fatigue Strength140 MPa at 1E+7 cycles. Kt (stress concentration factor) = 3.5
Fatigue Strength310 MPa 1E+7 cycles, Unnotched
Shear Modulus41 GPa 

Electrical Properties
Electrical Resistivity5.2e-005 ohm-cm 

Thermal Properties
Heat of Fusion325 J/g High Purity Ti.
CTE, linear 20°C9.9 µm/m-°C 20-93°C
CTE, linear 250°C9.5 µm/m-°C Unspecified heat treatment. Average over the range 0-315ºC
Specific Heat Capacity0.555 J/g-°C 
Thermal Conductivity19 W/m-K 
Melting PointMax 1660 °C Liquidus
Liquidus1660 °C 
Beta Transus890 °C 

Optical Properties
Emissivity (0-1)0.3 High purity Ti at 710°C
Reflection Coefficient, Visible (0-1)0.56 High purity Ti; visible light.

References are available for this material.

 


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