ASTM B338 Ti-Pd Alloy Gr7 pipes for Aerospace and Defense
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
Production Process of Gr7 Titanium Pipes
The production of ASTM B338 Ti-Pd Alloy Gr7 pipes is a highly specialized process to ensure compliance with the standard and maintain the unique properties of the material.
Titanium Extraction and Refining
Titanium is extracted from its ores (such as ilmenite or rutile) using the Process, producing sponge titanium.
Palladium is added during the refining process to create the Ti-Pd alloy.
Alloying
The palladium is uniformly distributed in the titanium matrix using vacuum arc remelting (VAR) or electron beam melting techniques.
Pipe Manufacturing TechniquesSeamless Pipes:
Made using a billet extrusion or piercing process to ensure a uniform, defect-free pipe.
These pipes undergo further cold rolling to achieve precise dimensions.
Welded Pipes:
Sheets or plates of Ti-Pd alloy are rolled into a cylindrical shape and welded longitudinally.
Welded pipes are more cost-effective but less suited for high-pressure environments.
Heat Treatment
Annealing or stress-relief treatment ensures uniform mechanical properties and enhances ductility.
Surface Finishing
The pipes are pickled, polished, or sandblasted to remove any impurities or surface defects.
Testing and Quality Control of ASTM B338 Gr7 Titanium Pipes
Ensuring the quality of titanium pipes is critical for maintaining safety and performance standards. ASTM B338 outlines rigorous testing requirements for Ti-Pd Alloy Gr7 pipes.
1. Chemical Composition Testing
Spectroscopy: Determines the precise chemical composition, ensuring palladium and titanium levels meet specifications.
2. Mechanical Testing
Tensile Test: Verifies the minimum yield strength, tensile strength, and elongation properties of the pipes.
Hardness Test: Checks for material uniformity and durability.
3. Non-Destructive Testing (NDT)
Ultrasonic Testing (UT): Detects internal flaws or inclusions in the pipe material.
Radiographic Testing (RT): Used to inspect welded pipes for defects in weld seams.
4. Dimensional and Visual Inspection
Ensures the pipes meet specified dimensions and are free from surface defects such as cracks, pits, or excessive oxidation.
5. Hydrostatic Testing
Pipes are subjected to internal pressure tests to verify their strength and leak-free operation under working conditions.
6. Corrosion Resistance Testing
Simulated environments (acidic or chloride-rich solutions) are used to assess the pipe's ability to resist corrosion under extreme conditions.
Advantages of ASTM B338 Gr7 Titanium Pipes
Superior Corrosion Resistance: Outstanding performance in acidic, chlorinated, and seawater environments due to palladium addition.
Lightweight and Strong: High strength-to-weight ratio, reducing structural load while maintaining durability.
Longevity: Extremely low maintenance and extended service life even in harsh environments.
Versatility: Suitable for a wide range of applications across chemical, marine, power generation, and aerospace industries.
Eco-Friendly: 100% recyclable, reducing the environmental impact.
Applications of Gr7 Titanium Steel Pipes
Gr7 titanium pipes are highly versatile and are used in numerous industries, including:
Chemical Processing: Resistant to strong acids and bases, making it ideal for heat exchangers and reactors.
Marine Environments: Perfect for desalination plants, shipbuilding, and offshore oil rigs due to its anti-corrosive properties.
Aerospace and Defense: Lightweight yet durable, suitable for aircraft and military equipment.
Power Generation: Used in nuclear power plants and geothermal systems for their resistance to high temperatures and chemicals.
Corrosion Resistance of Ti-Pd Alloy Gr7
The addition of palladium to titanium significantly enhances corrosion resistance, particularly against:
Acidic Media: Resists sulfuric, hydrochloric, and nitric acids.
Chlorides: Performs exceptionally well in saltwater and chloride-rich environments.
Stress Corrosion Cracking: Minimizes cracking due to stress and environmental exposure.
Gr7's performance surpasses unalloyed titanium grades like Gr2, making it a preferred choice for harsh chemical environments.
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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