Chemical composition
Nominal: mid-range where both limits are given, the cap where only a maximum is, balance takes the remainder. Exact specified ranges below.
| Element | Name | Content % | |
|---|---|---|---|
| Main elements3 elements | |||
| Ti | Titanium | Bal. | |
| Al | Aluminium | 5.5 – 6.5% | |
| V | Vanadium | 3.5 – 4.5% | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual5 elements | |||
| Fe | Iron | ≤ 0.25% | |
| O | Oxygen | ≤ 0.13% | |
| C | Carbon | ≤ 0.08% | |
| N | Nitrogen | ≤ 0.03% | |
| H | Hydrogen | ≤ 0.0125% | |
Mechanical minima by form
Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.
| Form | Condition | Rm MPa | Rp0.2 MPa | A ≥ % | Other requirements and notes |
|---|---|---|---|---|---|
| Bar and forgings | |||||
| Bar and billet | Annealed, t ≤76 mm and section ≤64.5 cm² | ≥ 828 (120 ksi) | ≥ 759 (110 ksi) | ≥ 10 | |
| Forgings | F-23: Annealed | ≥ 828 (120 ksi) | ≥ 759 (110 ksi) | ≥ 10 | Also specified: Reduction of area Z ≥ 25 % Applies to forgings up to 1935 mm² (3 in.²) in cross section; larger sections by agreement. |
| Forgings | F-23: Transformed-beta condition | ≥ 828 (120 ksi) | ≥ 759 (110 ksi) | ≥ 7.5 | Also specified: Reduction of area Z ≥ 25 % Applies to forgings up to 1935 mm² (3 in.²) in cross section; larger sections by agreement. Transformed-beta condition; elongation ≥6.0% at 25.4 mm section and over. |
| Plate, sheet and strip | |||||
| Plate, sheet and strip | Annealed, t ≤25 mm | ≥ 828 (120 ksi) | ≥ 759 (110 ksi) | ≥ 10 | |
| Tube and pipe | |||||
| Seamless pipe and tube | Annealed | ≥ 828 (120 ksi) | ≥ 759 (110 ksi) | ≥ 10 | |
| Seamless pipe and tube | Transformed-beta condition, wall <25.4 mm | ≥ 828 (120 ksi) | ≥ 759 (110 ksi) | ≥ 7.5 | |
Where this grade is recommended
Matched in 6 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Orthopaedic & dental implants | Medical Devices | In-body (37 °C) | 1 / 8 | 96 |
| Dental restoration | Medical Devices | In-body (37 °C) | 1 / 4 | 94 |
| Space structures & cryo tanks | Aerospace | Cryogenic −253 ~ 20 °C | 1 / 5 | 92 |
| Stents & cardiovascular | Medical Devices | In-body (37 °C) | 3 / 4 | 86 |
| Guidewires & implant wire | Medical Devices | In-body (37 °C) | 4 / 5 | 85 |
| LNG containment & cryogenics | Marine & Offshore | Cryogenic −163 °C | 4 / 4 | 76 |
Designations & equivalents
| UNS | R56407 |
| W.Nr. (Germany) | 3.7165 |
| Trade name(s) | Ti-6Al-4V ELI |
| ASTM / AISI | B265 / B348 / B381 / B861 / B862 / B863 (Grade 23) |
Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →
Applicable standards
6 specifications. Name the standard and its edition on the order.
Guaranteed values and required tests differ between specifications — see Mechanical minima by form for the figures per form.
Frequently asked questions
What is TC4-ELI (Gr.23)?
TC4-ELI (Gr.23) — Titanium. Extra-low interstitial — medical implants and cryogenic service
What is the maximum service temperature of TC4ELI?
Typically about 350 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.
What is the tensile strength of TC4ELI?
The specified minimum tensile strength is 828 MPa for the main product form. Minima for other forms and sizes are listed under "Mechanical minima by form" on this page.
Which standards cover TC4ELI?
ASTM B265, ASTM B348, ASTM B381, ASTM B861, ASTM B862, ASTM B863
Where is TC4ELI typically used?
Orthopaedic & dental implants (Medical Devices); Dental restoration (Medical Devices); Space structures & cryo tanks (Aerospace); Stents & cardiovascular (Medical Devices)
In which forms is TC4ELI available?
Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.
Same series
Download PDF datasheet
This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.
Download PDF datasheetSupply & enquiry
Tube & pipeφ1 – 219 × 0.25 – 25 mm
Plate4.76 – 80 mm
Barφ8 – 300 mm
Wire & filler metalsφ0.01 – 8 mmFor this grade we can supply, against your service conditions:
- Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
- Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
- Like-for-like alternatives and selection advice
- Applicable standards and inspection scope
Or email us: info@kochlin.com
Further reading: Alloy 625 Grade 1 vs Grade 2: a heat-treatment condition, not a quality level