# AWS ERTi-7 Weld Metal

AWS ERTi-7 is a titanium-based filler metal for welding. Cited properties are appropriate for the as-welded condition. It has a very low tensile strength among titanium alloys. In addition, it has a fairly high melting temperature and a fairly high embodied energy.

The graph bars on the material properties cards below compare AWS ERTi-7 to: titanium welding fillers (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* 16 *x 10 ^{6} psi*

Elongation at Break

20 *%*

Fatigue Strength

190 *MPa* 27 *x 10 ^{3} psi*

Poisson's Ratio

0.32

Shear Modulus

40 *GPa* 5.9 *x 10 ^{6} psi*

Tensile Strength: Ultimate (UTS)

340 *MPa* 50 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

280 *MPa* 40 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

420 *J/g*

Maximum Temperature: Mechanical

320 *°C* 600 *°F*

Melting Completion (Liquidus)

1670 *°C* 3030 *°F*

Melting Onset (Solidus)

1620 *°C* 2940 *°F*

Specific Heat Capacity

540 *J/kg-K* 0.13 *BTU/lb-°F*

Thermal Conductivity

21 *W/m-K* 12 *BTU/h-ft-°F*

Thermal Expansion

8.7 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

3.6 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

7.3 *% IACS*

## Otherwise Unclassified Properties

Density

4.5 *g/cm ^{3}* 280

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

800 *MJ/kg* 340 *x 10 ^{3} BTU/lb*

Embodied Water

470 *L/kg* 56 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

64 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

360 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

35 *points*

Strength to Weight: Axial

21 *points*

Strength to Weight: Bending

24 *points*

Thermal Diffusivity

8.8 *mm ^{2}/s*

Thermal Shock Resistance

26 *points*

## Alloy Composition

Ti | 99.417 to 99.8 | |

Pd | 0.12 to 0.25 | |

O | 0.080 to 0.16 | |

Fe | 0 to 0.12 | |

C | 0 to 0.030 | |

N | 0 to 0.015 | |

H | 0 to 0.0080 |

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

## Followup Questions

## Similar Alloys

## Further Reading

AWS A5.16: Specification for Titanium and Titanium-Alloy Welding Electrodes and Rods