Titanium ERTi-23
UNS R56407 · ASTM B863 ERTi-23
ERTi-23 is extra-low-interstitial Ti-6Al-4V ELI filler wire to ASTM B863 (UNS R56407), an alpha-beta alloy with controlled O, N, C and Fe for improved fracture toughness.
Reference datasheet — ERTi-23 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the AW condition
ERTi-23 tempers and conditions
ERTi-23 is supplied in 3 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
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 | — |
Supply forms, finishes and certifications
Ways ERTi-23 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
WIRE | Filler wire as supplied | Supply form |
What is ERTi-23?
ERTi-23 is extra-low-interstitial Ti-6Al-4V ELI filler wire to ASTM B863 (UNS R56407), an alpha-beta alloy with controlled O, N, C and Fe for improved fracture toughness. It is used to weld Grade 23 titanium where fatigue and damage tolerance govern, and is supplied as straightened TIG lengths, spooled wire and cleanroom-packaged medical stock. Deposits typically reach 860 MPa yield, 930 MPa tensile and 12% elongation at 320 HB, with service to about 315 °C. It costs more than standard ERTi-5 and needs strict shielding and cleanliness; where toughness is not critical, ERTi-5 is the direct substitute. ERTi-23 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). ERTi-23 has a yield strength of 860 MPa (125 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 71% of titanium grades. Elongation at break is 12% and the elastic modulus is 114 GPa (16.5 Msi).
What is ERTi-23 used for?
- Medical implant welding
- Aerospace fracture-critical components
- Cryogenic and biomedical titanium structures
Advantages
- Tough — resists crack growth — 80 MPa·√m (72.8 ksi·√in), better than 81% 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
- Limited ductility — 12%, worse than 78% of titanium grades
ERTi-23 properties
Typical room-temperature values for ERTi-23-AW; bars are the position among titanium grades.
Physical3
ERTi-23 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 has a yield strength of 860 MPa (125 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 71% of titanium grades. Elongation at break is 12% and the elastic modulus is 114 GPa (16.5 Msi).
Thermal6
ERTi-23 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 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 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's machinability is poor (20/100, worse than 68% of titanium grades); weldability excellent (85/100); formability poor (30/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the titanium family
Yield strength against density for every titanium grade FabDigit runs. ERTi-23 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ERTi-23
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.
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 |
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.
Surface treatments FabDigit runs on titanium parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Titanium ERTi-23 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R56407
- ASTM
- B863 ERTi-23
How much does ERTi-23 cost?
ERTi-23 is a high-cost titanium ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
ERTi-23 — frequently asked
What is ERTi-23 used for?
ERTi-23 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?
ERTi-23 has a typical yield strength of 860 MPa (125 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 71% of titanium grades. Strength varies by condition: see the 3 listed tempers.
Is ERTi-23 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 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?
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 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?
ERTi-23 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.
How much does ERTi-23 cost?
ERTi-23 is a high-cost titanium ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.