# Grade 6 (3.7115) Titanium

Grade 6 titanium is a titanium alloy formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. 3.7115 is the EN numeric designation for this material. Additionally, the ASTM designation is Titanium Grade 6.

It has the lowest melting temperature and a fairly low embodied energy among wrought titaniums.

The graph bars on the material properties cards below compare grade 6 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

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

Elongation at Break

11 *%*

Fatigue Strength

290 *MPa* 42 *x 10 ^{3} psi*

Poisson's Ratio

0.32

Reduction in Area

27 *%*

Shear Modulus

39 *GPa* 5.7 *x 10 ^{6} psi*

Shear Strength

530 *MPa* 77 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

890 *MPa* 130 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

840 *MPa* 120 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

410 *J/g*

Maximum Temperature: Mechanical

310 *°C* 580 *°F*

Melting Completion (Liquidus)

1580 *°C* 2870 *°F*

Melting Onset (Solidus)

1530 *°C* 2780 *°F*

Specific Heat Capacity

550 *J/kg-K* 0.13 *BTU/lb-°F*

Thermal Conductivity

7.8 *W/m-K* 4.5 *BTU/h-ft-°F*

Thermal Expansion

9.4 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

1.2 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

2.5 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

36 *% relative*

Density

4.5 *g/cm ^{3}* 280

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

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

Embodied Water

190 *L/kg* 22 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

92 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

3390 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

35 *points*

Strength to Weight: Axial

55 *points*

Strength to Weight: Bending

46 *points*

Thermal Diffusivity

3.2 *mm ^{2}/s*

Thermal Shock Resistance

65 *points*

## Alloy Composition

Ti | 89.8 to 94 | |

Al | 4.0 to 6.0 | |

Sn | 2.0 to 3.0 | |

Fe | 0 to 0.5 | |

O | 0 to 0.2 | |

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

ASTM B381: Standard Specification for Titanium and Titanium Alloy Forgings

ASTM B265: Standard Specification for Titanium and Titanium Alloy Strip, Sheet, and Plate

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

Aerospace Materials, Brian Cantor et al. (editors), 2001

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