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UNS R56406 Titanium

R56406 titanium is a titanium alloy formulated for casting. Cited properties are appropriate for the annealed condition. It has a fairly low electrical conductivity among cast titaniums. In addition, it has a fairly low thermal conductivity and a fairly high tensile strength.

The graph bars on the material properties cards below compare R56406 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

Elastic (Young's, Tensile) Modulus

110 GPa 15 x 106 psi

Elongation at Break

9.1 %

Fatigue Strength

480 MPa 69 x 103 psi

Poisson's Ratio


Reduction in Area

16 %

Shear Modulus

40 GPa 5.8 x 106 psi

Tensile Strength: Ultimate (UTS)

980 MPa 140 x 103 psi

Tensile Strength: Yield (Proof)

850 MPa 120 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


4.5 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)

85 MJ/m3

Resilience: Unit (Modulus of Resilience)

3420 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

35 points

Strength to Weight: Axial

61 points

Strength to Weight: Bending

49 points

Thermal Diffusivity

2.8 mm2/s

Thermal Shock Resistance

69 points

Alloy Composition

Titanium (Ti) 88.1 to 91
Aluminum (Al) 5.5 to 6.8
Vanadium (V) 3.5 to 4.5
Iron (Fe) 0 to 0.3
Oxygen (O) 0 to 0.2
Carbon (C) 0 to 0.1
Nitrogen (N) 0 to 0.050
Hydrogen (H) 0 to 0.015

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM F1108: Standard Specification for Titanium-6Aluminum-4Vanadium Alloy Castings for Surgical Implants (UNS R56406)

Titanium Alloys: Modelling of Microstructure, Properties, and Applications, Wei Sha and Savko Malinov, 2009

Titanium and Titanium Alloys: Fundamentals and Applications, Christoph Leyens and Manfred Peters (editors), 2003

Titanium, 2nd ed., G. Lutjering and J. C. Williams, 2007