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 | 3.5 – 4.5% | |
| V | Vanadium | 1.5 – 3% | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual8 elements | |||
| Fe | Iron | ≤ 0.25% | |
| Si | Silicon | ≤ 0.15% | |
| C | Carbon | ≤ 0.08% | |
| N | Nitrogen | ≤ 0.05% | |
| H | Hydrogen | ≤ 0.015% | |
| O | Oxygen | ≤ 0.15% | |
| Other | Other elements, each | ≤ 0.1% | |
| Other | Other elements, total | ≤ 0.3% | |
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 |
|---|---|---|---|---|---|
| Plate, sheet and strip | Annealed (M), t 0.5–1.0 mm | 685 – 835 | — | ≥ 25 | No yield requirement. |
| Plate, sheet and strip | Annealed (M), t >1.0–2.0 mm | 685 – 835 | — | ≥ 15 | As above |
| Plate, sheet and strip | Annealed (M), t >2.0–4.0 mm | 685 – 835 | — | ≥ 12 | As above |
| Plate, sheet and strip | Annealed (M), t >4.0–10.0 mm | 685 – 835 | — | ≥ 10 | As above |
Stress-rupture requirement
| Heat treatment | Annealed plate, sheet and strip, t 0.5–10.0 mm |
| Test temperature | 350 °C |
| Test stress | 390 MPa |
| Minimum life | ≥ 100 h |
Two temperature bands apply: at 350 °C, elevated-temperature tensile ≥420 MPa with rupture at an initial stress of 390 MPa for ≥100 h; at 400 °C, tensile ≥390 MPa with rupture at 360 MPa for ≥100 h.
More detail 2
The two are alternatives, not both assessed.
Tested only when the purchaser requires it and states so on the order.
This is a pass/fail acceptance test, not a design creep curve.
Where this grade is recommended
Matched in 1 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Platform structures & clamps | Marine & Offshore | Atmospheric & splash | 7 / 7 | 84 |
Designations & equivalents
| Trade name(s) | Ti-4Al-2V |
| GOST (Russia) | ≈ ПТ-3В |
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
2 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 TA17 (Ti-4Al-2V)?
TA17 (Ti-4Al-2V) — Titanium. Near-α titanium for naval and nuclear service — seawater-resistant, weldable
What is the maximum service temperature of TA17?
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 TA17?
The specified minimum tensile strength is 685 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 TA17?
GB/T 3621, GB/T 3620.1
Where is TA17 typically used?
Platform structures & clamps (Marine & Offshore)
In which forms is TA17 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