ASTM B338 Grade 7 Titanium Alloy Heat exchanger Polish Pipe
Oct 17, 2025 ASTM-B338-Titanium.pdf
GNEE can provide the form
Gr7 Titanium Rod
Gr7 Titanium Pipe
Gr7 Titanium Sheet
GR7 Thin Titanium Wire
Titanium Foil Roll Gr7
Products specification
| Product Name | Seamless titanium tube & pipe |
| Standard | ASTM B338. |
| Material | Grade 1,Grade 2,Grade 5,Grade 7,Grade 9,Grade 11,Grade 12… |
| Size | Dia 6.0mm ~114.3mm,
length is 18000mm (Max). |
| Type | Round, square, coiling |
| Technique | Hot forging, hot rolled, cold rolled |
| Goods Condition | M |
| Surfuace | Polishing, pickling, sand blasting |
| Application | Heat exchanger, condenser, water treatment, desalination,evaporator and pipelines etc. |
| Test | Water pressure test,Ultrasonic test,X-ray test,Eddy current test,Flaring and Flattening test. |
| Package Method | Wooden case, and Customer requirements |
| Payment way | T/T, L/C, can be negotitated. |
| Transportation | Sea(FCL/LCL), airplane, express(TNT/DHL/FEDEX) |
| Port | Shanghai,Tianjin,Qingdao |
| Certificate | EN10204 3.1/3.2 as required. |
Chemical components
| Material | N | C | H | Fe | O | Al | V | Pa | Mo | Ni | Ti |
| Gr7 | 0.03 | 0.08 | 0.015 | 0.30 | 0.25 | / | / | 0.12-0.25 | / | / | Balance |
Mechanical Property
| Tensile strength(min) | Yeild strength(min) | Elongation(%) | |||
| ksi | MPa | ksi | MPa | ||
| Grade7 | 50 | 345 | 40 | 275 | 20 |
Application
Heat exchanger, condenser, water treatment, desalination,evaporator and pipelines etc.
The high price of Gr7 titanium tube is mainly due to its unique composition and excellent performance, especially its excellent performance in corrosion resistance. The following are several main reasons for the high price of Gr7 titanium tube:
1. Rarity of alloy composition
High content of palladium (Pd): Gr7 titanium alloy is based on Gr2 pure titanium with 0.12-0.25% palladium added, and palladium is a very rare and expensive precious metal. Palladium is widely used in catalysts, electronics industry and other fields, with high demand and limited supply, which greatly increases the cost of Gr7 titanium tube. The high cost of palladium directly pushes up the price of the alloy.
2. Excellent corrosion resistance
Extremely strong corrosion resistance: The addition of palladium makes Gr7 titanium tube have excellent corrosion resistance in extremely corrosive environments, especially in acidic and chloride environments. This makes it more suitable for applications such as chemical equipment, marine engineering, nuclear power plants and oil and gas industries that require long-term resistance to strong corrosion than conventional pure titanium (such as Gr2) and other titanium alloys.
Resistance to pitting and crevice corrosion: Palladium is particularly effective in preventing pitting and crevice corrosion in chloride media, so Gr7 is more stable than other grades in highly corrosive environments. This unique property makes it more expensive.
3. Difficult to process
High-temperature processing characteristics of palladium: Due to the special physical and chemical properties of palladium, titanium alloys containing palladium require more sophisticated processes and strict temperature control during processing to avoid material deformation or degradation of properties. Therefore, it is more difficult to manufacture and process Gr7 titanium tubes, which increases production costs.
4. Strong specificity and concentrated demand
Application fields are highly specific: Gr7 titanium tubes are mainly used in high-end and special fields, such as chemical industry, nuclear industry, marine engineering, etc. These fields have very high requirements for material quality, so they usually need to purchase titanium alloys of excellent quality and meet specific standards, which limits large-scale mass production and also makes manufacturers only supply materials for niche markets, further pushing up prices.
5. Complex production process
Precision smelting and processing: The production of Gr7 titanium tubes requires not only the smelting of high-purity titanium, but also the precise control of the palladium content, while ensuring the uniform distribution of palladium elements in the casting, extrusion, welding and other links. These strict process requirements lead to an increase in production costs.
Products provided by GNEE
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Production Name |
Titanium Pipe/Tube |
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Grade |
Gr1, Gr2, Gr3,Gr4,Gr5, Gr7, Gr6,Gr9, Gr11, Gr12 ,Gr16, Gr17,Gr25 |
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Size |
All sizes can be customized |
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Application |
Metallurgy, electronics, machinery, medical treatment, chemical industry, petroleum, medical treatment, aerospace |
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Feature |
High corrosion resistance, low density, good thermal stability |
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Technology |
Hot Forged, Hot Rolled, Cold Rolled, Annealing, Pickling |
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Surface |
Bright, Polished, Pickling, Acid cleaning, Sandblasting |
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Packing |
Export Standard Woodcase |
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Delivery time |
10-25days according to the quantity and process of the product |
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Quality and test |
Hardness test, Bending test, Hydrostatic etc. |
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Product name |
Pure Titanium bar/Pure Titanium rod/Titanium alloy bar/Tianium alloy rod |
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Standard |
GB/T 2965-2007 GB/T 13810-2007, ASTM B348,ASTM F67,ASTM F136, AMS4928,MIL4911 |
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Titanium type |
Commercially Pure(CP) / Titanium alloy |
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Grade |
TA1 TA2 TA3 TA4 TA5 TA6 TA7 TA8 TA9 TA10 TA11 TA12 TA13 TA14 |
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Diameter |
3-350mm |
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Length |
Max6000mm |
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Technique |
Forging, machining |
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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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Grade |
GR1,GR2,GR3,GR5,GR6,GR7,GR9,GR11,GR12, etc. |
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Standard |
ASTM B265,ASTM F136,ASTM F67,AMS4928 |
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Size |
0.5-5.0mm x 1000mm x 2000-3500mm (Thickness x Width x Length) |
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Application |
Metallurgy, electronics, machinery, medical treatment, chemical industry, petroleum, medical treatment, aerospace |
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Supply status |
M (Y/ R/ ST) |
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Feature |
High corrosion resistance, low density, good thermal stability |
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Technics |
Hot Forged, Hot Rolled, Cold Rolled, Annealing, Pickling |
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Surface |
Bright, Polished, Pickling, Acid cleaning, Sandblasting |
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Packing |
Export Standard Woodcase |
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MOQ |
100kg |
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Payment terms |
T/T, L/C, D/A, D/P, Escrow, Western Union, PayPal |
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Certificate |
ISO 9001:2008; The third test report; TÜV Rheinland; |
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Delivery time |
7-15days according to the quantity and process of the product |
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Quality and test |
Hardness test, Bending test, Hydrostatic etc. |
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Product Name
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Polished 1mm 1.5mm 2mm 3mm Nitinol Shape Memory Straight Wire Nickel Titanium Wire for Medical
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Material Type
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NiTiCu NiTi, Fe NiTi
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Room Temperature(0C - 15C)
Low temperature (Below 0C) High temperature(40C - 120C) |
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Feature
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Superelastic or Shape memory
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Standard
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ASTM F2603-18/12
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Surface
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Natural Oxide, Pickled/Etched, Centerless Ground and Mechanically-cleaned
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Condition
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As Cold-Worked, Straight Strain Annealed and Shape Set Annealed.
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Certificate
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Transformed Temperatures, Tensile Properties, Chemical Composition and Customer Specific Requirements
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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. Medical field : with very good biocompatibility with human body, medical nitinol wire can be used in medical field.
2. Eye glasses manufacturer : Low density, high toughness, high stability, biocompability with human boday, nickel titanium alloy wire is becoming more popular between eye glasses manufacturers. 3. Fishing wire: nickel titanium alloy wire now is widely used as fishign wire because of its high strenght and very good memorability and superelastic. |
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Processing |
CNC Turning, CNC Milling, Laser Cutting, Bending, Spinning, Wire Cutting, Stamping, Electric Discharge Machining (EDM), Injection Molding |
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Materials |
Aluminum: 2000 series, 6000 series, 7075, 5052, etc. |
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Stainless steel: SUS303, SUS304, SS316, SS316L, 17-4PH, etc. |
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Steel: 1214L/1215/1045/4140/SCM440/40CrMo, etc. |
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Brass: 260, C360, H59, H60, H62, H63, H65, H68, H70, Bronze, Copper |
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Titanium: Grade F1-F5 |
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Plastic: Acetal/POM/PA/Nylon/PC/PMMA/PVC/PU/Acrylic/ABS/PTFE/PEEK etc. |
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Surface Treatment |
Anodized, Bead Blasted, Silk Screen, PVD Plating, Zinc/Nickel/Chrome/Titanium Plating, Brushing, Painting, Powder Coated, Passivation, Electrophoresis, Electro Polishing, Knurl, Laser/Etch/Engrave etc. |
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Tolerance |
±0.002 ~ ±0.005mm |
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Surface Roughness |
Min Ra 0.1~3.2 |
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