Products Description
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.
Chemical & Mechanical Properties
| ASTM B338 Gr.7 Chemical Composition (%) | ||||||
| C | Fe | Ti | H | Pd | O | N |
| ≤0.08% | ≤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 |
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.
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) |
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| 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 |
Titanium products that GNEE can provide
Titanium CNC machined parts
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Custom CNC Machining Parts of Most Materials
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Quotation
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According to your drawing(size, material, thickness, processing content, and required technology, etc)
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Materials Avaiable
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Titanium,Brass,Stainless Steel,Q235&Q345 steel, Zinc-plate Sheet,Stainless Steel, Aluminum,Copper, etc.
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Surface Treatment
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Zinc Plating, chrome plate, powder coating, anodizing, wire drawing, silk-screen printing, etc
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Processing
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Laser Cutting, Precision Stamping, CNC Bending, CNC Milling, CNC Turning, Threading, Riveting, Drilling, CNC Punching,Die Casting, Laser Welding, etc.
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Testing Equipment
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CMM/Tool microscope/multi-joint arm/Automatic height gauge/Manual height gauge/Dial gauge/Roughness measurement
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Drawing Formats
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PRO/E, Auto CAD, Solid Works , UG, CAD / CAM / CAE, PDF
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Our Advantages
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1.) 24 hours online service & Quickly Quote/Delivery.
2.) 100% QC quality inspection before delivery, and can provide quality inspection form.
3.) 18+ years of experience in the CNC machining area and have a senior design team to offer perfect modification suggestions. |
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Tolerance丨Surface Roughness
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Generally +/-0.1-0.2mm
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Sample service
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Avaliable before bulk order. Samples charge according your design, The sample fee can be used as the payment for mass goods.
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Product Name
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Customized Titanium Tube Seamless Titanium Tube Welding Titanium Tube
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Material
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Pure titanium and Titanium alloy
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Titanium Grade
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Grade 1-Unalloyed titanium
Grade 2-Unalloyed titanium
Grade 3-Unalloyed titanium
Grade 7-Unalloyed titanium plus 0.12 to 0.25 %palladium
Grade 9-Titanium alloy (3 % aluminum, 2.5 % vanadium)
Grade 12-Titanium alloy (0.3 % molybdenum, 0.8 % nickel),
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Standard
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ASTM B338/ASME SB338, ASTM B337/ASME SB337, ASTM B861/ASME SB861, ASTM B862/ASME SB862,AMS4911,AMS4928
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Shape
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Round Square Rectangle
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Type
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Seamless/Welded
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Seamless titanium tube: Titanium sponge-Compacting electrodes-melting-Forge-Bar billets-Extruding-Rolled-Straightening-Seamless tube
Welded titanium tube: Titanium sponge-Compacting electrodes-melting-Forge-Plate billets-Hot rolled-Cold rolled-Titanium scrap-Welded-Welded tube |
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Surface
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Polishing, picking, acid washed, black oxide
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Application
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1) Heat Exchanger, Condensers, Water Treatment, Desalination
2) Fluid, gas and oil transport
3) Pressure and heat transmission
4) Construction and ornament
5) Motorbycle and bike
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Material Milling Certificate
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According to. EN 10204.3.1
Including Chemical composition and Mechanical property |
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Product name |
Pure Titanium bar/Pure Titanium rod/Titanium alloy bar/Tianium alloy rod |
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Standard |
ASTM B348/ASTM F136/ASTM F67/AMS 4928/AMS 4965L |
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Grade |
GR1,GR2,GR3,GR4,GR5,GR7,GR9,GR11,GR12,GR23 |
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Diameter |
6-500mm,customizable |
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Length |
Max6000mm |
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Supply state |
Hot working state, Cold working state, Annealed state, Solid solution state |
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Surface |
Acid surface or polishing, sand blasted surface |
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Shape |
Round, flat, square, hexagonal |
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Application |
Metallurgy, electronics, medical, chemical, petroleum, pharmaceutical, aerospace, etc. |
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Item |
Titanium plate,Titanium sheet |
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Grade |
GR1,GR2,GR5,GR7,GR9,GR12,GR23,etc. |
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Size |
0.3-80mm≤300-1500mm≤12000mm or as your request |
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Standard |
ASTM B265, ASME SB265,AMS491 |
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Material |
pure titanium ( gr1, gr2, gr3,gr4) |
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Titanium Alloy(GR5, GR7,GR9,GR23,TI-6AL-7NB) |
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Ti-6Al-2Sn-4Zr-2Mo, Ti-6Al-2Sn-4Zr-6Mo |
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Ti-V(15wt%)-Cr(3wt%)-Sn(3wt%)-Al(3wt%) |
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Quality and test |
Hardness test, Bending test, Hydrostatic etc. |
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Application |
Chemical industry, Aerospace, Industry, etc. |
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Feature |
High strength, Corrosion resistance, High performance |
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Technics |
Hot rolled,Cold Rolled |
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Surface |
Bright, Polished, Pickling, Acid cleaning, Sandblasting |
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Product name |
Pure Titanium bar/Pure Titanium rod/Titanium alloy bar/Tianium alloy wire |
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Standard |
ASTM B348/ASTM F136/ASTM F67/AMS 4928/AMS 4965L |
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Grade |
Gr5ELI |
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Diameter |
0.2-500mm,customizable |
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Length |
Max6000mm |
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Supply state |
Hot working state, Cold working state, Annealed state, Solid solution state |
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Surface |
Acid surface or polishing, sand blasted surface |
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Shape |
Round, flat, square, hexagonal |
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Application |
Metallurgy, electronics, medical, chemical, petroleum, pharmaceutical, aerospace, etc. |
why choose us
why choose our products
Since our establishment in 2008, our company has focused on the research, development, production, and export of high-quality titanium alloy products. We utilize advanced production equipment and are equipped with a full suite of precision testing instruments, including advanced spectrometers and ultrasonic flaw detectors. From raw materials to finished products, we rigorously control material composition, mechanical properties, and microstructure to ensure that all titanium and titanium alloy products meet international standards. If you have any questions, please contact us today!
Email:sale@gneemetal.com
