Titanium ERTi-5-STA (Solution treated and aged)
Heat-treated state
GB ERTi5 · ISO 24034 Ti5
Only for thin, fully machinable aerospace weldments where maximum weld strength is required; sacrifices ductility and toughness.
Values for the STA condition
Other ERTi-5 tempers and conditions
ERTi-5 is listed in 3 conditions; see the grade overview at ERTi-5.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Pick for pressure vessels and fatigue-critical weldments where residual stress and as-welded α′ must be tempered. | 880 | 950 | 10 | 33 HRC | — |
AWDefault As-welded deposit | Default condition for a GTAW/GMAW deposit made with ERTi-5 and left in the as-welded state. | 895 | 965 | 8 | 34 HRC | — |
STAThis page Solution treated and aged | Only for thin, fully machinable aerospace weldments where maximum weld strength is required; sacrifices ductility and toughness. | 1,000 | 1,100 | 6 | 40 HRC | — |
What is ERTi-5-STA?
ERTi-5-STA is ERTi-5 heat treated to STA — only for thin, fully machinable aerospace weldments where maximum weld strength is required; sacrifices ductility and toughness. ERTi-5-STA has a yield strength of 1,000 MPa (145 ksi) and a tensile strength of 1,100 MPa (160 ksi) — stronger than 93% of titanium grades. Elongation at break is 6% and the elastic modulus is 113 GPa (16.4 Msi). ERTi-5-STA has a density of 4.43 g/cm³ (0.16 lb/in³), lighter than 89% of titanium grades. It melts at 1,604°C (2,919 °F). AW is the default condition FabDigit quotes; STA is available on request or by drawing note.
Advantages
- High strength — 1,000 MPa (145 ksi), better than 93% of titanium grades
Limitations
- Limited ductility — 6%, worse than 100% of titanium grades
- Low fracture toughness — 45 MPa·√m (41 ksi·√in), worse than 98% of titanium grades
- Poor heat conductor — 6.7 W/m·K (3.87 BTU/hr·ft·°F), worse than 92% of titanium grades
- Low electrical conductivity — 1 % IACS, worse than 89% of titanium grades
ERTi-5-STA properties
Typical room-temperature values for ERTi-5-STA; 11 are specific to this condition. Other listed values are ERTi-5 reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
ERTi-5-STA has a density of 4.43 g/cm³ (0.16 lb/in³), lighter than 89% of titanium grades. It melts at 1,604°C (2,919 °F).
Mechanical16
ERTi-5-STA has a yield strength of 1,000 MPa (145 ksi) and a tensile strength of 1,100 MPa (160 ksi) — stronger than 93% of titanium grades. Elongation at break is 6% and the elastic modulus is 113 GPa (16.4 Msi).
Thermal6
ERTi-5-STA is rated for continuous service to 350°C (662 °F). It conducts heat at 6.7 W/m·K (3.87 BTU/hr·ft·°F), worse than 92% of titanium grades. Thermal expansion is 8.7 µm/m·K (4.83 µin/in·°F).
Electrical3
ERTi-5-STA conducts electricity at 1 % IACS, worse than 89% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), worse than 77% of titanium grades.
Sustainability4
Producing a kilogram of ERTi-5-STA takes about 650 MJ of energy and emits 40 kg of CO₂ — less than 75% of titanium grades. Typical recycled content is 15%.
Manufacturability8
ERTi-5-STA's machinability is poor (20/100, worse than 68% of titanium grades); weldability very good (70/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ERTi-5-STA
Is ERTi-5 easy to machine?
Weld deposits machine like Ti-6Al-4V: low speed, high feed, rigid setup, flood coolant, sharp carbide — burr and work-harden readily and never dry-grind (fire risk).
Can ERTi-5 be welded?
GTAW/GMAW/PAW/EB/laser with high-purity argon or helium, trailing shield and back purge to keep the bead silver; keep interstitials low, clean wire and joint with acetone, and stress relieve 540–650 °C for thick or fatigue-loaded joints.
Can ERTi-5 be formed, bent or molded?
Wire is supplied straightened or spooled; cold bending of the deposit is limited — hot form base metal above 600 °C rather than cold working the weld.
What surface finishes work on ERTi-5?
Pickle in HNO₃/HF or bead blast to remove alpha case and heat tint, then anodize (AMS 2488) or leave passive; avoid iron contamination from steel tooling and brushes.
ERTi-5 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Alα stabilizer | 5.5 – 6.75 | 6.1 |
| Vβ stabilizer | 3.5 – 4.5 | 4 |
| Fe | ≤ 0.22 | 0.15 |
| Ocontrolled range per AWS A5.16 | 0.12 – 0.2 | 0.16 |
| C | ≤ 0.05 | 0.02 |
| N | ≤ 0.03 | 0.01 |
| Hhydrogen embrittlement control | ≤ 0.02 | 0.01 |
| Yyttrium limit | ≤ 0.01 | — |
| Other, each | ≤ 0.1 | — |
| Other, total | ≤ 0.4 | — |
| Ti | balance | — |
ERTi-5-STA — frequently asked
What is ERTi-5-STA used for?
ERTi-5-STA is typically used for aerospace airframe titanium welds, high-strength structural titanium joints, landing gear and engine components and medical implant fabrication. In short: highest-strength titanium filler; matches Grade 5 base metal; aerospace structural welds.
What is the yield strength of ERTi-5-STA?
ERTi-5-STA has a typical yield strength of 1,000 MPa (145 ksi) and a tensile strength of 1,100 MPa (160 ksi) — stronger than 93% of titanium grades. Strength varies by condition: see the 3 listed tempers.
Is ERTi-5-STA easy to machine?
Not especially — machinability is rated poor (20/100, worse than 68% of titanium grades). Weld deposits machine like Ti-6Al-4V: low speed, high feed, rigid setup, flood coolant, sharp carbide — burr and work-harden readily and never dry-grind (fire risk).
Can ERTi-5-STA be welded?
Yes — weldability is rated very good (70/100). GTAW/GMAW/PAW/EB/laser with high-purity argon or helium, trailing shield and back purge to keep the bead silver; keep interstitials low, clean wire and joint with acetone, and stress relieve 540–650 °C for thick or fatigue-loaded joints.
What surface finishes work on ERTi-5-STA?
Pickle in HNO₃/HF or bead blast to remove alpha case and heat tint, then anodize (AMS 2488) or leave passive; avoid iron contamination from steel tooling and brushes.
Can ERTi-5-STA be formed, bent or molded?
Wire is supplied straightened or spooled; cold bending of the deposit is limited — hot form base metal above 600 °C rather than cold working the weld.
What is the maximum service temperature of ERTi-5-STA?
ERTi-5-STA is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ERTi-5-AW and ERTi-5-STA?
AW is the default condition — default condition for a GTAW/GMAW deposit made with ERTi-5 and left in the as-welded state. STA: only for thin, fully machinable aerospace weldments where maximum weld strength is required; sacrifices ductility and toughness. Yield strength is 895 MPa in AW versus 1,000 MPa in STA.
Sources
- AWS A5.16/A5.16M — Specification for Titanium and Titanium-Alloy Welding Electrodes and Rods — AWS (2013)
- ISO 24034 — Welding consumables, solid wires and rods for fusion welding of titanium and titanium alloys — ISO (2020)
- ASTM B348 / ASTM F1472 (Grade 5 Ti-6Al-4V chemistry and properties) — ASTM (2021)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (Ti-6Al-4V) — ASM International (1990)
- Welding Handbook Vol. 4 — Titanium and Titanium Alloys — AWS (2011)
- MMPDS — Ti-6Al-4V design allowables — Battelle/FAA (2023)
- Titanium filler wire ERTi-5 datasheets — Perryman / Sandvik / (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.