Titanium / UNS R52400
Titanium Grade 7 is Grade 2 with a small palladium addition, which greatly extends corrosion resistance into reducing acids and hot, low-pH chloride brines.
- UNS R52400
- W.Nr. 3.7235
- Spec ASTM B265
- Density 4.51 g/cm³
Also known as / equivalents
| System | Designation |
|---|---|
| UNS | R52400 |
| W.Nr. | 3.7235 |
| Also known as | Ti Gr 7, Ti-0.15Pd, 3.7235 |
Chemical composition
| Element | Min % | Max % |
|---|---|---|
| N | — | 0.03 |
| C | — | 0.08 |
| H | — | 0.015 |
| Fe | — | 0.30 |
| O | — | 0.25 |
| Pd | 0.12 | 0.25 |
| Ti | Bal. | — |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength (min) | 345 MPa (50.0 ksi) |
| Yield strength, 0.2% offset (min) | 275 MPa (39.9 ksi) |
| Elongation in 50 mm (min) | 20 % |
Physical properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 4.51 g/cm³ | 0.163 lb/in³ |
| Magnetic response | Non-magnetic | — |
Available forms & specifications
| Form | Specification | Size range |
|---|---|---|
| Sheets, strip & plates | ASTM B265 / ASME SB265 | 0.3 mm – 6 mm |
| Seamless & welded pipe | ASTM B861, B862 | 1/8" – 24" NB |
| Tubes | ASTM B338 | 1/8" – 24" NB |
| Bars & billets | ASTM B348 | 3 mm – 500 mm |
| Forgings | ASTM B381 | 1/2" – 48" NB (larger on request) |
| Fittings | ASTM B363 | 1/2" – 48" NB |
Corrosion & temperature resistance
Titanium's stable oxide film gives near-immunity to seawater, chlorides and oxidising acids; Grade 7's palladium addition extends this into reducing acids and hot brines.
Applications
Titanium Grade 7: Chlor-alkali, acid and brine service. Heat exchangers and condensers, chlorine and chlorate plants, desalination, marine hardware and aerospace components.
Titanium Grade 7 vs Titanium Grade 2
| Titanium Grade 7 | Titanium Grade 2 | |
|---|---|---|
| UNS | R52400 | R50400 |
| Key property | Pd-enhanced corrosion resistance | Commercially pure, corrosion resistant |
| Typical use | Chlor-alkali, acid and brine service | Heat exchangers, chlorine plant, marine |
| Cr (wt %) | — | — |
| Ni (wt %) | — | — |
| Mo (wt %) | — | — |
| C (wt %) | ≤ 0.08 | ≤ 0.08 |
| Tensile / yield (min, MPa) | 345 / 275 | 345 / 275 |
Frequently asked questions
What is the UNS number of Titanium Grade 7?
Titanium Grade 7 is designated UNS R52400 (W.Nr. 3.7235).
What is Titanium Grade 7 used for?
Pd-enhanced corrosion resistance. Typical uses: chlor-alkali, acid and brine service.
Is Titanium Grade 7 magnetic?
Non-magnetic.
In which forms can I buy Titanium Grade 7 from Rajkamal Metals?
Coils & Strips, Sheets & Plates, Pipes & Tubes, Round Bars & Rods, Flanges, Buttweld Fittings, Socket Weld & Threaded Fittings, Fasteners. Sizes as per standard; other sizes on request.
Do you supply a Mill Test Certificate with Titanium Grade 7?
Yes. Actual values are given in the Mill Test Certificate (EN 10204 3.1) supplied with each order.
What is the difference between Titanium Grade 7 and Titanium Grade 2?
Titanium Grade 7: pd-enhanced corrosion resistance. Titanium Grade 2: commercially pure, corrosion resistant. See the comparison table on this page.
Last updated: 30 October 2026. Grade names identify the supply range; designations are not engineering equivalents. Availability, make, origin and documentation are confirmed at quotation.
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