Titanium Grade 7 (UNS R52400) is an alloyed grade 2 titanium with the addition of 0.12%-0.25% pd, to improve it. Both the basic chemical composition and mechanical properties are the same as grade 2 titanium with a minimum tensile strength of 345 MPa (50 ksi). However, due to the inclusion of palladium, the corrosive tendency shifts to the passive range allowing the formation of an oxide film in reducing acids. They are available in seamless and welded forms with various sizes and wall thicknesses, Titanium Grade 7 Tubes deliver reliable performance in demanding operating conditions. USA Piping Solution is a reliable manufacturer and supplier of Titanium Grade 7 Tubes, providing high-quality and performance tubes that comply with international standards and various industry needs.
Specifications of Titanium Grade 7 Tubes
| Specification Feature | Details |
|---|---|
| Standards | ASTM B338, ASME SB338 (Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchangers) |
| UNS Number | R52400 |
| Werkstoff Nr. | 3.7235 |
| Palladium Content | 0.12 to 0.25% (the defining addition of this grade) |
| Base Grade | Chemically equivalent to Grade 2 plus palladium |
| Condition | Annealed |
| Seamless Tube Size | 3.35 mm OD to 101.6 mm OD |
| Welded Tube Size | 6.35 mm OD to 152 mm OD |
| Tube Gauge (BWG) | 10 BWG through 20 BWG (0.134 in. to 0.035 in. wall) |
| Wall Thickness | 0.020" – 0.220" (Special wall thicknesses available) |
| Dimensional Tolerance | Per ASTM B338 Table 3 and Table 4 |
| Length | Single Random, Double Random, Standard & Cut length |
| Finish | Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF |
| Form | Round, coiled, square, rectangular, straight length, U-bent, hydraulic and hollow tube |
| Type | Seamless, ERW, EFW, Welded, Fabricated |
| End | Plain End, Beveled End, Threaded |
| Marking | Standard, Grade, OD, Thickness, Length, Heat No. (or customized per client request) |
| Applications | Condenser tube, heat exchanger tube, chemical process fluid lines, pollution control scrubber tube |
| Value-Added Services | Draw & Expansion as per required size & length, Polish (Electro & Commercial), Annealed & Pickled, Bending, Machining, etc. |
| Specializations | • Titanium Grade 7 Capillary Tube & Other non-standard sizes • Titanium Grade 7 Heat Exchanger & Condenser Tubes |
| Test Certificates | • Independent laboratory test report from an A2LA-accredited facility • Mill test report to EN 10204 Type 3.1 • Under Third Party Inspection |
Application and Industrial Uses of Titanium Grade 7 Tubes
- Chemical Processing Industry
- Desalination Industry
- Marine & Offshore Industry
- Oil & Gas Industry
- Power Generation Industry
- Pollution Control Industry
- Pulp & Paper Industry
- Petrochemical & Refining Industry
Frequently Asked Questions
1. What are Titanium Grade 7 Tubes?
Titanium Grade 7 Tubes are commercially pure titanium tubes alloyed with a small amount of palladium, offering excellent corrosion resistance and durability in aggressive chemical environments.
2. What are Titanium Grade 7 Tubes used for?
Titanium Grade 7 Tubes are used in chemical processing, marine, desalination, oil and gas, power generation, and pollution control applications where superior corrosion resistance is required.
3. Are Titanium Grade 7 Tubes corrosion resistant?
Yes. Titanium Grade 7 Tubes provide exceptional resistance to seawater, chlorides, oxidizing and reducing acids, making them suitable for highly corrosive environments.
4. Why does Titanium Grade 7 contain palladium?
Palladium is added to Titanium Grade 7 to significantly improve its resistance to reducing acids and other aggressive corrosive chemicals, extending the tube's service life.
5. Can Titanium Grade 7 Tubes be welded?
Yes. Titanium Grade 7 Tubes have excellent weldability and can be welded using proper inert gas shielding without compromising their corrosion resistance.