Grade 15 (R53415) Titanium
Grade 15 titanium is a titanium alloy formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. R53415 is the UNS number for this material. Additionally, the ASTM designation is Titanium Grade 15.
The graph bars on the material properties cards below compare grade 15 titanium to: wrought titaniums (top), all titanium alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
110 GPa 16 x 106 psi
Elongation at Break
20 %
Fatigue Strength
290 MPa 42 x 103 psi
Poisson's Ratio
0.32
Reduction in Area
28 %
Shear Modulus
41 GPa 5.9 x 106 psi
Shear Strength
340 MPa 49 x 103 psi
Tensile Strength: Ultimate (UTS)
540 MPa 78 x 103 psi
Tensile Strength: Yield (Proof)
430 MPa 63 x 103 psi
Thermal Properties
Latent Heat of Fusion
420 J/g
Maximum Temperature: Mechanical
320 °C 600 °F
Melting Completion (Liquidus)
1660 °C 3020 °F
Melting Onset (Solidus)
1610 °C 2930 °F
Specific Heat Capacity
540 J/kg-K 0.13 BTU/lb-°F
Thermal Conductivity
21 W/m-K 12 BTU/h-ft-°F
Thermal Expansion
8.7 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
3.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
6.7 % IACS
Otherwise Unclassified Properties
Base Metal Price
37 % relative
Density
4.5 g/cm3 280 lb/ft3
Embodied Carbon
32 kg CO2/kg material
Embodied Energy
520 MJ/kg 220 x 103 BTU/lb
Embodied Water
210 L/kg 25 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
100 MJ/m3
Resilience: Unit (Modulus of Resilience)
870 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
35 points
Strength to Weight: Axial
33 points
Strength to Weight: Bending
33 points
Thermal Diffusivity
8.4 mm2/s
Thermal Shock Resistance
41 points
Alloy Composition
| Ti | 98.2 to 99.56 | |
| Ni | 0.4 to 0.6 | |
| Fe | 0 to 0.3 | |
| O | 0 to 0.25 | |
| Ru | 0.040 to 0.060 | |
| C | 0 to 0.080 | |
| N | 0 to 0.050 | |
| H | 0 to 0.015 | |
| res. | 0 to 0.4 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
Titanium Alloys: Modelling of Microstructure, Properties, and Applications, Wei Sha and Savko Malinov, 2009
ASTM B861: Standard Specification for Titanium and Titanium Alloy Seamless Pipe
ASTM B381: Standard Specification for Titanium and Titanium Alloy Forgings
ASTM B265: Standard Specification for Titanium and Titanium Alloy Strip, Sheet, and Plate
ASTM B348: Standard Specification for Titanium and Titanium Alloy Bars and Billets
Titanium and Titanium Alloys: Fundamentals and Applications, Christoph Leyens and Manfred Peters (editors), 2003
Titanium, 2nd ed., G. Lutjering and J. C. Williams, 2007