# UNS R58150 Titanium (Ti-15Mo)

R58150 titanium is a titanium alloy formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. R58150 is the UNS number for this material. Ti-15Mo is the common industry name.

It has a fairly high density among wrought titaniums. In addition, it has a fairly high melting temperature and a fairly low heat capacity.

The graph bars on the material properties cards below compare R58150 titanium to: wrought 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

140 *GPa* 20 *x 10 ^{6} psi*

Elongation at Break

13 *%*

Fatigue Strength

330 *MPa* 49 *x 10 ^{3} psi*

Poisson's Ratio

0.32

Reduction in Area

68 *%*

Shear Modulus

52 *GPa* 7.5 *x 10 ^{6} psi*

Shear Strength

470 *MPa* 68 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

770 *MPa* 110 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

550 *MPa* 80 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

410 *J/g*

Maximum Temperature: Mechanical

320 *°C* 600 *°F*

Melting Completion (Liquidus)

1760 *°C* 3190 *°F*

Melting Onset (Solidus)

1700 *°C* 3090 *°F*

Specific Heat Capacity

500 *J/kg-K* 0.12 *BTU/lb-°F*

Thermal Expansion

8.4 *µm/m-K*

## Otherwise Unclassified Properties

Base Metal Price

48 *% relative*

Density

5.4 *g/cm ^{3}* 340

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

480 *MJ/kg* 210 *x 10 ^{3} BTU/lb*

Embodied Water

150 *L/kg* 17 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

94 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

1110 *kJ/m ^{3}*

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

32 *points*

Strength to Weight: Axial

40 *points*

Strength to Weight: Bending

35 *points*

Thermal Shock Resistance

48 *points*

## Alloy Composition

Ti | 83.5 to 86 | |

Mo | 14 to 16 | |

O | 0 to 0.2 | |

C | 0 to 0.1 | |

Fe | 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 F2066: Standard Specification for Wrought Titanium-15 Molybdenum Alloy for Surgical Implant Applications (UNS R58150)

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

Sintering of Advanced Materials: Fundamentals and Processes, Zhigang Zak Fang (editor), 2010