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 elements5 elements | |||
| Ti | Titanium | Bal. | |
| Al | Aluminium | 5.5 – 7.1% | |
| Zr | Zirconium | 1.5 – 2.5% | |
| V | Vanadium | 0.8 – 2.5% | |
| Mo | Molybdenum | 0.5 – 2% | |
| 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 |
|---|---|---|---|---|---|
| Bar and forgings | |||||
| Bar | Annealed (M) / hot-worked (R) / cold-worked (Y), dia. or section 7–100 mm | ≥ 885 | ≥ 825 | ≥ 8 | Also specified: Reduction of area Z ≥ 20 % Properties are measured on heat-treated test blanks. |
| Plate, sheet and strip | |||||
| Plate, sheet and strip | Annealed (M), t 0.8–1.8 mm | 930 – 1130 | ≥ 855 | ≥ 12 | |
| Plate, sheet and strip | Annealed (M), t >1.8–4.0 mm | 930 – 1130 | ≥ 855 | ≥ 10 | |
| Plate, sheet and strip | Annealed (M), t >4.0–10.0 mm | 930 – 1130 | ≥ 855 | ≥ 8 | |
| Plate, sheet and strip | Annealed (M), t >10.0–70.0 mm | 930 – 1130 | ≥ 855 | ≥ 6 | |
Stress-rupture requirement
| Heat treatment | Bar; plate has two further thickness bands — see the note |
| Test temperature | 500 °C |
| Test stress | 470 MPa |
| Minimum life | ≥ 50 h |
At 500 °C there are four cases, depending on form and thickness; the order must state which:
More detail 6
· Bar: elevated-temperature tensile ≥570 MPa; rupture 470 MPa for ≥50 h
· Plate 0.8 to <30 mm: tensile ≥635 MPa; rupture 470 MPa for ≥50 h, or 440 MPa for ≥100 h
· Plate 30–70 mm: tensile ≥570 MPa; rupture as for the thin band
Thin plate is 65 MPa stronger than bar at temperature; only the heavy band matches bar.
For plate the standard offers two alternative rupture criteria — high stress for a short time, or lower stress for longer — and the parties choose one.
Both standards state that elevated-temperature properties are assessed only when the purchaser requires them and says so on the order.
This is a pass/fail acceptance test, not a design creep curve.
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 |
|---|---|---|---|---|
| Airframe & lightweight | Aerospace | ≤ 200 °C | 5 / 10 | 89 |
| Lightweight parts & springs | Automotive & Racing | ≤ 150 °C | 4 / 7 | 84 |
Designations & equivalents
| Trade name(s) | Ti-6.5Al-1Mo-1V-2Zr |
| GOST (Russia) | ≈ ВТ20 |
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
3 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 TA15 (Ti-6.5Al-1Mo-1V-2Zr)?
TA15 (Ti-6.5Al-1Mo-1V-2Zr) — Titanium. Near-α grade for aerospace plate and forgings
What is the maximum service temperature of TA15?
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 TA15?
The specified minimum tensile strength is 885 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 TA15?
GB/T 2965, GB/T 3621, GB/T 3620.1
Where is TA15 typically used?
Airframe & lightweight (Aerospace); Lightweight parts & springs (Automotive & Racing)
In which forms is TA15 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