Titanium ERTi-23-ANN (Annealed)
Heat-treated state
UNS R56407 · ASTM B863 ERTi-23
Pick for maximum weld ductility and fracture toughness, e.g. cryogenic vessels and fracture-critical aerospace joints.
Values for the ANN condition
Other ERTi-23 tempers and conditions
ERTi-23 is listed in 3 conditions; see the grade overview at ERTi-23.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNThis page Annealed | Pick for maximum weld ductility and fracture toughness, e.g. cryogenic vessels and fracture-critical aerospace joints. | 830 | 900 | 15 | 32 HRC | — |
Stress relieved | Pick when residual stress and distortion control matter (thick sections, machined weldments) without changing strength much. | 850 | 920 | 13 | 33 HRC | 1 % IACS |
AWDefault As-welded deposit | Default condition: all-weld-metal properties straight off the torch with full inert-gas shielding and trailing shield. | 860 | 930 | 12 | 34 HRC | — |
What is ERTi-23-ANN?
ERTi-23-ANN is ERTi-23 heat treated to ANN — pick for maximum weld ductility and fracture toughness, e.g. cryogenic vessels and fracture-critical aerospace joints. ERTi-23-ANN has a yield strength of 830 MPa (120 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 62% of titanium grades. Elongation at break is 15% and the elastic modulus is 114 GPa (16.5 Msi). ERTi-23-ANN 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; ANN is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 100 MPa·√m (91 ksi·√in), better than 100% of titanium grades
Limitations
- 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-23-ANN properties
Typical room-temperature values for ERTi-23-ANN; 10 are specific to this condition. Other listed values are ERTi-23 reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
ERTi-23-ANN 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-23-ANN has a yield strength of 830 MPa (120 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 62% of titanium grades. Elongation at break is 15% and the elastic modulus is 114 GPa (16.5 Msi).
Thermal6
ERTi-23-ANN is rated for continuous service to 315°C (599 °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 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
ERTi-23-ANN conducts electricity at 1 % IACS, worse than 89% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (90/100), worse than 63% of titanium grades.
Sustainability4
Producing a kilogram of ERTi-23-ANN takes about 700 MJ of energy and emits 45 kg of CO₂ — more than 74% of titanium grades. Typical recycled content is 10%.
Manufacturability8
ERTi-23-ANN's machinability is poor (20/100, worse than 68% of titanium grades); weldability excellent (85/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ERTi-23-ANN
Is ERTi-23 easy to machine?
Weld deposit machines like Ti-6Al-4V — low speed, high feed, rigid setup, sharp uncoated-carbide or PVD tools and flood coolant to avoid work hardening and chip fires.
Can ERTi-23 be welded?
GTAW/GMAW/PAW/EBW with 99.999 % argon or helium, torch + trailing + backing shield, clean gloves and degreased wire; keep interpass below ~150 °C and reject any weld with straw/blue-to-grey oxide colour.
Can ERTi-23 be formed, bent or molded?
Wire is supplied straightened or spooled; bending the filler is fine, but structural cold forming of the joint should be done before welding or hot at 700–800 °C.
What surface finishes work on ERTi-23?
Pickle in HNO3/HF or abrasive-blast with clean alumina to remove alpha case, then passivate; colour anodising per AMS 2488 Type II is available for identification.
ERTi-23 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 |
|---|---|---|
| AlAWS A5.16 ERTi-23 / ASTM B863 | 5.5 – 6.75 | 6 |
| V | 3.5 – 4.5 | 4 |
| FeELI limit | ≤ 0.25 | 0.15 |
| Oextra-low interstitial | ≤ 0.13 | 0.1 |
| C | ≤ 0.03 | 0.02 |
| N | ≤ 0.02 | 0.01 |
| Hwire; low H critical to avoid weld embrittlement | ≤ 0.01 | 0 |
| Yyttrium limit | ≤ 0.01 | — |
| Other, each | ≤ 0.1 | — |
| Other, total | ≤ 0.4 | — |
| Ti | balance | — |
ERTi-23-ANN — frequently asked
What is ERTi-23-ANN used for?
ERTi-23-ANN is typically used for medical implant welding, aerospace fracture-critical components and cryogenic and biomedical titanium structures. In short: toughest Ti-6Al-4V filler; implant-grade ELI chemistry; matches Grade 23 base metal.
What is the yield strength of ERTi-23-ANN?
ERTi-23-ANN has a typical yield strength of 830 MPa (120 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 62% of titanium grades. Strength varies by condition: see the 3 listed tempers.
Is ERTi-23-ANN easy to machine?
Not especially — machinability is rated poor (20/100, worse than 68% of titanium grades). Weld deposit machines like Ti-6Al-4V — low speed, high feed, rigid setup, sharp uncoated-carbide or PVD tools and flood coolant to avoid work hardening and chip fires.
Can ERTi-23-ANN be welded?
Yes — weldability is rated excellent (85/100). GTAW/GMAW/PAW/EBW with 99.999 % argon or helium, torch + trailing + backing shield, clean gloves and degreased wire; keep interpass below ~150 °C and reject any weld with straw/blue-to-grey oxide colour.
What surface finishes work on ERTi-23-ANN?
Pickle in HNO3/HF or abrasive-blast with clean alumina to remove alpha case, then passivate; colour anodising per AMS 2488 Type II is available for identification.
Can ERTi-23-ANN be formed, bent or molded?
Wire is supplied straightened or spooled; bending the filler is fine, but structural cold forming of the joint should be done before welding or hot at 700–800 °C.
What is the maximum service temperature of ERTi-23-ANN?
ERTi-23-ANN is rated for continuous use to about 315°C (599 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ERTi-23-AW and ERTi-23-ANN?
AW is the default condition — default condition: all-weld-metal properties straight off the torch with full inert-gas shielding and trailing shield. ANN: pick for maximum weld ductility and fracture toughness, e.g. cryogenic vessels and fracture-critical aerospace joints. Yield strength is 860 MPa in AW versus 830 MPa in ANN.
Sources
- AWS A5.16/A5.16M — Specification for Titanium and Titanium-Alloy Welding Electrodes and Rods — AWS (2013)
- ASTM B863 — Standard Specification for Titanium and Titanium Alloy Wire — ASTM International (2021)
- ASTM B348 / F136 — Ti-6Al-4V ELI (UNS R56401/R56407) bar and forgings — ASTM International (2019)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering (titanium weldments) — ASM International (1993)
- MMPDS — Ti-6Al-4V ELI design allowables — Battelle/FAA (2023)
- Titanium filler wire ERTi-23 datasheets — ( / /Perryman/VDM) (2024)
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.