Chemical composition
Nominal: elements given only as a maximum are counted at the cap; the balance takes the remainder.
| Element | Name | Content % | |
|---|---|---|---|
| Main elements1 element | |||
| Ti | Titanium | Bal. | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual7 elements | |||
| O | Oxygen | ≤ 0.4% | |
| Fe | Iron | ≤ 0.5% | |
| C | Carbon | ≤ 0.08% | |
| N | Nitrogen | ≤ 0.05% | |
| 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 | ≥ 550 (80 ksi) | ≥ 483 (70 ksi) | ≥ 15 | |
| Forgings | F-4: Annealed | ≥ 550 (80 ksi) | ≥ 483 (70 ksi) | ≥ 15 | 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 | ≥ 550 (80 ksi) | 483 – 655 | ≥ 15 | |
Where this grade is recommended
Matched in 3 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Dental restoration | Medical Devices | In-body (37 °C) | 2 / 4 | 88 |
| Orthopaedic & dental implants | Medical Devices | In-body (37 °C) | 5 / 8 | 88 |
| Surgical instruments | Medical Devices | In-body (37 °C) | 4 / 5 | 84 |
Designations & equivalents
| UNS | R50700 |
| W.Nr. (Germany) | 3.7065 |
| Trade name(s) | CP-Ti Grade 4 |
| ASTM / AISI | B265 / B348 / B381 / B861 / B863 (Grade 4) |
| AMS (SAE aerospace) | 4921 |
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 CP Titanium Grade 4?
CP Titanium Grade 4 — Titanium. Highest-strength CP titanium — fittings and rings
What is the maximum service temperature of TA4?
Typically about 300 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.
What is the tensile strength of TA4?
The specified minimum tensile strength is 550 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 TA4?
ASTM B265, ASTM B348, ASTM B381, ASTM B861, ASTM B863, AMS 4921
Where is TA4 typically used?
Dental restoration (Medical Devices); Orthopaedic & dental implants (Medical Devices); Surgical instruments (Medical Devices)
In which forms is TA4 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