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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. % Mo 0.3   Ni 0.8   Ti 98.9

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 Properties	Original Value		Comments
Density	4.5 g/cc
Mechanical Properties
Tensile Strength, Ultimate	620 MPa
Tensile Strength, Yield	480 MPa
Elongation at Break	23 %
Modulus of Elasticity	103 GPa		in tension.
Notched Tensile Strength	620 MPa		Kt (stress concentration factor) = 5.3
Poisson's Ratio	0.28
Fatigue Strength	140 MPa		at 1E+7 cycles. Kt (stress concentration factor) = 3.5
Fatigue Strength	310 MPa		1E+7 cycles, Unnotched
Shear Modulus	41 GPa
Electrical Properties
Electrical Resistivity	5.2e-005 ohm-cm
Thermal Properties
Heat of Fusion	325 J/g		High Purity Ti.
CTE, linear 20°C	9.9 µm/m-°C		20-93°C
CTE, linear 250°C	9.5 µm/m-°C		Unspecified heat treatment. Average over the range 0-315ºC
Specific Heat Capacity	0.555 J/g-°C
Thermal Conductivity	19 W/m-K
Melting Point	Max 1660 °C		Liquidus
Liquidus	1660 °C
Beta Transus	890 °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.