Grade C-6 Cast Titanium
Grade C-6 titanium is a titanium alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has the lowest embodied energy among cast titaniums. In addition, it has a fairly low ductility and a moderately low electrical conductivity.
The graph bars on the material properties cards below compare grade C-6 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
290
Elastic (Young's, Tensile) Modulus
100 GPa 15 x 106 psi
Elongation at Break
9.0 %
Fatigue Strength
460 MPa 67 x 103 psi
Poisson's Ratio
0.32
Rockwell C Hardness
32
Shear Modulus
39 GPa 5.7 x 106 psi
Tensile Strength: Ultimate (UTS)
890 MPa 130 x 103 psi
Tensile Strength: Yield (Proof)
830 MPa 120 x 103 psi
Thermal Properties
Latent Heat of Fusion
410 J/g
Maximum Temperature: Mechanical
310 °C 580 °F
Melting Completion (Liquidus)
1580 °C 2870 °F
Melting Onset (Solidus)
1530 °C 2780 °F
Specific Heat Capacity
550 J/kg-K 0.13 BTU/lb-°F
Thermal Conductivity
7.8 W/m-K 4.5 BTU/h-ft-°F
Thermal Expansion
9.8 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.5 % IACS
Otherwise Unclassified Properties
Base Metal Price
36 % relative
Density
4.5 g/cm3 280 lb/ft3
Embodied Carbon
30 kg CO2/kg material
Embodied Energy
480 MJ/kg 210 x 103 BTU/lb
Embodied Water
190 L/kg 22 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
78 MJ/m3
Resilience: Unit (Modulus of Resilience)
3300 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
35 points
Strength to Weight: Axial
55 points
Strength to Weight: Bending
46 points
Thermal Diffusivity
3.2 mm2/s
Thermal Shock Resistance
63 points
Alloy Composition
| Ti | 89.7 to 94 | |
| Al | 4.0 to 6.0 | |
| Sn | 2.0 to 3.0 | |
| Fe | 0 to 0.5 | |
| O | 0 to 0.2 | |
| 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