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 | ≤ 0.35% | |
| Fe | Iron | ≤ 0.3% | |
| 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 | ≥ 450 (65 ksi) | ≥ 380 (55 ksi) | ≥ 18 | |
| Forgings | F-3: Annealed | ≥ 450 (65 ksi) | ≥ 380 (55 ksi) | ≥ 18 | Also specified: Reduction of area Z ≥ 30 % 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 | ≥ 450 (65 ksi) | 380 – 550 | ≥ 18 | |
Where this grade is recommended
Matched in 11 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Nitric & oxidising media | Chemical Processing | ≤ 60 °C | 2 / 7 | 92 |
| Evaporators & tube bundles | Chemical Processing | ≤ 80 °C | 3 / 8 | 90 |
| Ballast & tank systems | Marine & Offshore | ≤ 40 °C | 4 / 10 | 88 |
| Aquaculture & harbour works | Marine & Offshore | Seawater ≤ 40 °C | 4 / 8 | 88 |
| Desalination & RO | Marine & Offshore | ≤ 45 °C | 8 / 12 | 88 |
| Water & gas injection | Oil & Gas | ≤ 60 °C | 5 / 8 | 86 |
| Firewater & deluge | Marine & Offshore | ≤ 40 °C | 5 / 7 | 86 |
| Wet Cl₂, chlor-alkali | Chemical Processing | ≤ 80 °C | 10 / 11 | 84 |
| Seawater piping & HX | Marine & Offshore | ≤ 40 °C | 10 / 11 | 84 |
| Separators & heat-exchanger internals | Oil & Gas | ≤ 120 °C | 8 / 10 | 82 |
| Organic & acetic acid | Chemical Processing | 120 – 200 °C | 6 / 7 | 76 |
Designations & equivalents
| UNS | R50550 |
| W.Nr. (Germany) | 3.7055 |
| Trade name(s) | CP-Ti Grade 3 |
| ASTM / AISI | B265 / B338 / B348 / B381 / B861 / B862 / B863 (Grade 3) |
| AMS (SAE aerospace) | 4900 |
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
8 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 3?
CP Titanium Grade 3 — Titanium. Higher-strength CP titanium for pressure-retaining shells
What is the maximum service temperature of TA3?
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 TA3?
The specified minimum tensile strength is 450 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 TA3?
ASTM B265, ASTM B348, ASTM B338, ASTM B381, ASTM B861, ASTM B862, ASTM B863, AMS 4900
Where is TA3 typically used?
Nitric & oxidising media (Chemical Processing); Evaporators & tube bundles (Chemical Processing); Ballast & tank systems (Marine & Offshore); Aquaculture & harbour works (Marine & Offshore)
In which forms is TA3 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