ASTM B338 Gr.7 Titanium Tube for Heat Exchanger Condenser
Brand Name:YUHONG
Certification:ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number:ASTM B338 Gr.7 (UNS R52400)
Minimum Order Quantity:500KGS
Delivery Time:35-40 days
Payment Terms:L/C,T/T
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- YUHONG brand goods have been already exported to more than 85 countries With more than 35 years' experience, because of strict quality control policy, excellent sales service, delivery on time. YUHONG won more and more new clients and got more and more repeat orders from old clients, in YUHONG People's mind: Quality is First Important!
ASTM B338 Gr.7 (UNS R52400) Seamless and Welded Titanium Tube For Heat Exchanger and Condenser
ASTM B338 Gr.7 (UNS R52400) seamless and welded titanium tubes are palladium-enhanced alpha titanium alloy tubes specifically designed for heat exchangers and condensers in highly corrosive environments. These tubes combine the inherent corrosion resistance of commercially pure titanium (Grade 2) with 0.12-0.25% palladium addition, significantly improving resistance to reducing acids (e.g., hydrochloric/sulfuric acid) and localized corrosion. Available in both seamless (cold-worked) and welded forms, they exhibit minimum yield strength of 275 MPa (40 ksi) and exceptional thermal conductivity, making them ideal for shell-and-tube heat exchangers, seawater cooling systems, and chemical processing equipment where stainless steels or copper alloys fail prematurely.
1.Chemical & Mechanical Properties
| ASTM B335 Gr.7 Chemical Composition (%) | ||||||
| C | Fe | Ti | H | Pd | O | N |
| 76.0-79.0% | ≤0.3% | BAL | ≤0.015% | 0.12-0.25% | ≤0.25% | ≤0.03% |
Mechanical Properties
| Property | Standard Value (Annealed) |
| Tensile Strength | ≥ 345 MPa (50 ksi) |
| Yield Strength | ≥ 275 MPa (40 ksi) |
| Elongation | ≥ 20% (in 4D for seamless tubes) ≥ 15% (in 4D for welded tubes) |
| Hardness (Brinell) | ≤ 200 HV (Vickers) ≤ 90 HRB (Rockwell B) |
| Bend Test | No cracks after bending around a mandrel |
| Hydrostatic Test | (No leakage) under specified pressure |
2. Key Adventages
Material Properties
- Excellent Corrosion Resistance:Especially resistant to chlorides, acidic/alkaline media (e.g., seawater, chemical fluids).
- Ti-0.2Pd Alloy (Grade 7):Palladium addition enhances resistance in reducing environments.
Mechanical Performance
- High Strength & Lightweight:Tensile strength ≥ 345 MPa, yield strength ≥ 275 MPa, density only 60% of steel.
- Good Ductility:Elongation ≥ 20% (seamless) / ≥ 15% (welded) in 4D gauge length.
Thermal Performance
- High Thermal Conductivity:Ideal for heat transfer applications in exchangers/condensers.
- Heat Resistance:Stable operation up to 300°C (depends on environment).
Product Forms
- Seamless Tubes:No weld seams, higher pressure resistance for critical applications.
- Welded Tubes:Cost-effective, reliability verified by bend tests.
3. Key Applications
- Oil & Gas
Refinery hydrogenation units
LNG heat exchangers
Pipeline heating systems
- Chemical Industry
Chlor-alkali equipment
Pickling line heat exchangers
PTA production units
- Power Generation
Nuclear plant condensers
FGD systems in coal plants
Geothermal heat exchangers
- Marine Engineering
Desalination plants
Offshore platform cooling systems
Naval vessel heat exchangers
- Aerospace
Aircraft engine oil coolers
ECLSS (Environmental Control Systems)
- Environmental
Flue gas scrubbers
Wastewater evaporators
Hazardous waste pyrolysis units
| Category | Gr.7 (Ti-0.2Pd) | Gr.1 | Gr.2 | Gr.5 (Ti-6Al-4V) | Gr.9 (Ti-3Al-2.5V) |
|---|---|---|---|---|---|
| UNS Number | R52400 | R50250 | R50400 | R56400 | R56320 |
| Main Composition | Ti-0.2Pd Alloy | Pure Ti (Low O) | Pure Ti (Standard) | Ti-6Al-4V Alloy | Ti-3Al-2.5V Alloy |
| Tensile Strength (MPa) | 345-483 | 240-310 | 345-483 | 895-1034 | 483-620 |
| Yield Strength (MPa) | 275-380 | 170-240 | 275-380 | 828-897 | 345-550 |
| Elongation (%) | ≥20 | ≥24 | ≥20 | ≥10 | ≥15 |
| Corrosion Resistance | Best for HCl/H₂SO₄ | Good for seawater/weak acids | General corrosion resistance | Resists chlorides (weak welds) | Good seawater resistance |
| Typical Applications | Strong acids, nuclear plants | Chemical linings | Desalination, heat exchangers | Aerospace, pressure vessels | Ship piping |
ASTM B338 Gr.7 Titanium Tube for Heat Exchanger Condenser
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