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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

Mechanical Properties

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