# 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 10 ^{6} psi*

Elongation at Break

9.1 *%*

Fatigue Strength

480 *MPa* 69 *x 10 ^{3} psi*

Poisson's Ratio

0.32

Reduction in Area

16 *%*

Shear Modulus

40 *GPa* 5.8 *x 10 ^{6} psi*

Tensile Strength: Ultimate (UTS)

980 *MPa* 140 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

850 *MPa* 120 *x 10 ^{3} 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

4.5 *g/cm ^{3}* 280

*lb/ft*

^{3}Embodied Carbon

38 *kg CO _{2}/kg material*

Embodied Energy

610 *MJ/kg* 260 *x 10 ^{3} BTU/lb*

Embodied Water

200 *L/kg* 24 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

85 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

3420 *kJ/m ^{3}*

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 *mm ^{2}/s*

Thermal Shock Resistance

69 *points*

## Alloy Composition

Ti | 88.1 to 91 | |

Al | 5.5 to 6.8 | |

V | 3.5 to 4.5 | |

Fe | 0 to 0.3 | |

O | 0 to 0.2 | |

C | 0 to 0.1 | |

N | 0 to 0.050 | |

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