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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	Metric	English	Comments
Density	4.5 g/cc	0.163 lb/in³
Mechanical Properties
Tensile Strength, Ultimate	620 MPa	89900 psi
Tensile Strength, Yield	480 MPa	69600 psi
Elongation at Break	23 %	23 %
Modulus of Elasticity	103 GPa	14900 ksi	in tension.
Notched Tensile Strength	620 MPa	89900 psi	Kt (stress concentration factor) = 5.3
Poisson's Ratio	0.28	0.28
Fatigue Strength	140 MPa	20300 psi	at 1E+7 cycles. Kt (stress concentration factor) = 3.5
Fatigue Strength	310 MPa	45000 psi	1E+7 cycles, Unnotched
Shear Modulus	41 GPa	5950 ksi
Electrical Properties
Electrical Resistivity	5.2e-005 ohm-cm	5.2e-005 ohm-cm
Thermal Properties
Heat of Fusion	325 J/g	140 BTU/lb	High Purity Ti.
CTE, linear 20°C	9.9 µm/m-°C	5.5 µin/in-°F	20-93°C
CTE, linear 250°C	9.5 µm/m-°C	5.28 µin/in-°F	Unspecified heat treatment. Average over the range 0-315ºC
Specific Heat Capacity	0.555 J/g-°C	0.133 BTU/lb-°F
Thermal Conductivity	19 W/m-K	132 BTU-in/hr-ft²-°F
Melting Point	Max 1660 °C	Max 3020 °F	Liquidus
Liquidus	1660 °C	3020 °F
Beta Transus	890 °C	1630 °F
Optical Properties
Emissivity (0-1)	0.3	0.3	High purity Ti at 710°C
Reflection Coefficient, Visible (0-1)	0.56	0.56	High purity Ti; visible light.

References are available for this material.