Grade C-5 Cast Titanium
Grade C-5 titanium is a titanium alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has a fairly low electrical conductivity among cast titaniums. In addition, it has the lowest ductility and the highest tensile strength.
The graph bars on the material properties cards below compare grade C-5 titanium to: cast 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
Brinell Hardness
310
Elastic (Young's, Tensile) Modulus
110 GPa 15 x 106 psi
Elongation at Break
6.7 %
Fatigue Strength
510 MPa 74 x 103 psi
Poisson's Ratio
0.32
Rockwell C Hardness
34
Shear Modulus
40 GPa 5.8 x 106 psi
Tensile Strength: Ultimate (UTS)
1000 MPa 150 x 103 psi
Tensile Strength: Yield (Proof)
940 MPa 140 x 103 psi
Thermal Properties
Latent Heat of Fusion
410 J/g
Maximum Temperature: Mechanical
340 °C 640 °F
Melting Completion (Liquidus)
1610 °C 2930 °F
Melting Onset (Solidus)
1560 °C 2840 °F
Specific Heat Capacity
560 J/kg-K 0.13 BTU/lb-°F
Thermal Conductivity
7.1 W/m-K 4.1 BTU/h-ft-°F
Thermal Expansion
9.6 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.0 % IACS
Otherwise Unclassified Properties
Base Metal Price
36 % relative
Density
4.4 g/cm3 280 lb/ft3
Embodied Carbon
38 kg CO2/kg material
Embodied Energy
610 MJ/kg 260 x 103 BTU/lb
Embodied Water
200 L/kg 24 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
66 MJ/m3
Resilience: Unit (Modulus of Resilience)
4200 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
35 points
Strength to Weight: Axial
63 points
Strength to Weight: Bending
50 points
Thermal Diffusivity
2.9 mm2/s
Thermal Shock Resistance
71 points
Alloy Composition
| Ti | 87.5 to 91 | |
| Al | 5.5 to 6.8 | |
| V | 3.5 to 4.5 | |
| Fe | 0 to 0.4 | |
| O | 0 to 0.25 | |
| C | 0 to 0.1 | |
| Ni | 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
ASTM B367: Standard Specification for Titanium and Titanium Alloy Castings
Titanium and Titanium Alloys: Fundamentals and Applications, Christoph Leyens and Manfred Peters (editors), 2003
Titanium, 2nd ed., G. Lutjering and J. C. Williams, 2007
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015