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 106 psi
Elongation at Break
20 %
Fatigue Strength
190 MPa 27 x 103 psi
Poisson's Ratio
0.32
Shear Modulus
40 GPa 5.9 x 106 psi
Tensile Strength: Ultimate (UTS)
340 MPa 50 x 103 psi
Tensile Strength: Yield (Proof)
280 MPa 40 x 103 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/cm3 280 lb/ft3
Embodied Carbon
47 kg CO2/kg material
Embodied Energy
800 MJ/kg 340 x 103 BTU/lb
Embodied Water
470 L/kg 56 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
64 MJ/m3
Resilience: Unit (Modulus of Resilience)
360 kJ/m3
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 mm2/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