# AWS ERTi-12 Weld Metal

AWS ERTi-12 is a titanium-based filler metal for welding. Cited properties are appropriate for the as-welded condition. It has a fairly high melting temperature among titanium alloys. In addition, it has a moderately low embodied energy and a moderately low tensile strength.

The graph bars on the material properties cards below compare AWS ERTi-12 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

12 *%*

Fatigue Strength

200 *MPa* 30 *x 10 ^{3} psi*

Poisson's Ratio

0.32

Shear Modulus

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

Tensile Strength: Ultimate (UTS)

480 *MPa* 70 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

340 *MPa* 50 *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)

7.1 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

37 *% relative*

Density

4.5 *g/cm ^{3}* 280

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

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

Embodied Water

110 *L/kg* 13 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

52 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

550 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

35 *points*

Strength to Weight: Axial

30 *points*

Strength to Weight: Bending

30 *points*

Thermal Diffusivity

8.7 *mm ^{2}/s*

Thermal Shock Resistance

37 *points*

## Alloy Composition

Ti | 99.147 to 99.66 | |

Mo | 0.2 to 0.4 | |

O | 0.080 to 0.16 | |

Ni | 0.060 to 0.090 | |

Fe | 0 to 0.15 | |

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