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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

Titanium (Ti) 87.5 to 91
Aluminum (Al) 5.5 to 6.8
Vanadium (V) 3.5 to 4.5
Iron (Fe) 0 to 0.4
Oxygen (O) 0 to 0.25
Carbon (C) 0 to 0.1
Nickel (Ni) 0 to 0.050
Hydrogen (H) 0 to 0.015
Residuals 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