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 | 4 – 6% | |
| Sn | Tin | 2 – 3% | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual7 elements | |||
| O | Oxygen | ≤ 0.2% | |
| Fe | Iron | ≤ 0.5% | |
| C | Carbon | ≤ 0.08% | |
| N | Nitrogen | ≤ 0.03% | |
| H | Hydrogen | ≤ 0.015% | |
| Other | Other elements, each | ≤ 0.1% | |
| Other | Other elements, total | ≤ 0.4% | |
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 (≤76 mm thick, cross-section ≤64.5 cm²) | Annealed | ≥ 828 (120 ksi) | ≥ 795 (115 ksi) | ≥ 10 | Also specified: Reduction of area Z ≥ 25 % |
| Forgings | F-6: Annealed | ≥ 828 (120 ksi) | ≥ 795 (115 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. |
| Plate, sheet and strip | |||||
| Plate, sheet and strip | Annealed | ≥ 828 (120 ksi) | ≥ 793 (115 ksi) | ≥ 10 | |
Where this grade is recommended
Matched in 2 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Space structures & cryo tanks | Aerospace | Cryogenic −253 ~ 20 °C | 2 / 5 | 90 |
| LNG containment & cryogenics | Marine & Offshore | ≤ 40 °C | 3 / 4 | 78 |
Designations & equivalents
| UNS | R54520 |
| W.Nr. (Germany) | 3.7115 |
| Trade name(s) | Ti-5Al-2.5Sn |
| ASTM / AISI | B265 / B348 / B381 / B863 (Grade 6) |
| AMS (SAE aerospace) | 4910 / 4926 / 4966 |
| GOST (Russia) | ≈ ВТ5-1 |
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
7 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 TA7 (Ti-5Al-2.5Sn)?
TA7 (Ti-5Al-2.5Sn) — Titanium. Weldable medium-temperature strength; ELI variant serviceable to −253 °C
What is the maximum service temperature of TA7?
Typically about 500 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.
What is the tensile strength of TA7?
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 TA7?
ASTM B265, ASTM B348, ASTM B381, ASTM B863, AMS 4910, AMS 4926, AMS 4966
Where is TA7 typically used?
Space structures & cryo tanks (Aerospace); LNG containment & cryogenics (Marine & Offshore)
In which forms is TA7 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