# Grade 37 (R52815) Titanium

Grade 37 titanium is a titanium alloy formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. R52815 is the UNS number for this material. Additionally, the ASTM designation is Titanium Grade 37.

It has a moderately low tensile strength and a moderately low embodied energy among wrought titaniums.

The graph bars on the material properties cards below compare grade 37 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

110 *GPa* 15 *x 10 ^{6} psi*

Elongation at Break

22 *%*

Fatigue Strength

170 *MPa* 25 *x 10 ^{3} psi*

Poisson's Ratio

0.32

Reduction in Area

34 *%*

Shear Modulus

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

Shear Strength

240 *MPa* 35 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

390 *MPa* 56 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

250 *MPa* 36 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

420 *J/g*

Maximum Temperature: Mechanical

310 *°C* 590 *°F*

Melting Completion (Liquidus)

1650 *°C* 2990 *°F*

Melting Onset (Solidus)

1600 *°C* 2910 *°F*

Specific Heat Capacity

550 *J/kg-K* 0.13 *BTU/lb-°F*

Thermal Conductivity

21 *W/m-K* 12 *BTU/h-ft-°F*

Thermal Expansion

8.9 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

3.4 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

6.8 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

36 *% relative*

Density

4.5 *g/cm ^{3}* 280

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

500 *MJ/kg* 220 *x 10 ^{3} BTU/lb*

Embodied Water

120 *L/kg* 15 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

76 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

280 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

35 *points*

Strength to Weight: Axial

24 *points*

Strength to Weight: Bending

26 *points*

Thermal Diffusivity

8.4 *mm ^{2}/s*

Thermal Shock Resistance

29 *points*

## Alloy Composition

Ti | 96.9 to 99 | |

Al | 1.0 to 2.0 | |

Fe | 0 to 0.3 | |

O | 0 to 0.25 | |

C | 0 to 0.080 | |

N | 0 to 0.030 | |

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

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

ASTM B348: Standard Specification for Titanium and Titanium Alloy Bars and Billets

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