ASTM B338 Ti-Pd Alloy Gr7 Titanium Steel Pipe
Oct 17, 2025 ASTM-B338-Titanium.pdf
GNEE can provide the form
Gr7 Titanium Rod
Gr7 Titanium Pipe
Gr7 Titanium Sheet
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Titanium Foil Roll Gr7
ASTM B338 Ti-Pd Alloy Gr7 Titanium Steel Pipe
Titanium and its alloys have gained immense popularity in industrial applications, particularly in high-performance sectors where strength, corrosion resistance, and longevity are essential. Among the various titanium grades, ASTM B338 Ti-Pd Alloy Gr7 stands out due to its exceptional properties, making it a preferred choice for demanding environments such as chemical processing, marine industries, and power generation plants.
Introduction to ASTM B338 Ti-Pd Alloy Gr7
The ASTM B338 standard sets the benchmark for titanium and titanium alloy pipes, providing detailed specifications for seamless and welded pipes used in industrial applications. Grade 7 (Gr7) is a titanium alloy that incorporates a small percentage of palladium, enhancing its corrosion resistance in highly acidic and chloride-rich environments. This unique composition makes Gr7 a standout material for industries that prioritize durability and resistance to chemical degradation.
Understanding ASTM B338 Standard
The ASTM B338 standard governs the production of titanium pipes, ensuring high-quality materials meet specific mechanical and chemical requirements. Key aspects include:
Material Composition: Guidelines for titanium and alloy content.
Mechanical Properties: Minimum tensile strength, yield strength, and elongation percentages.
Dimensional Accuracy: Precise tolerances for pipe dimensions.
Testing Requirements: Rigorous testing for compliance, including tensile and chemical tests.
Meeting ASTM B338 is crucial for manufacturers to ensure reliability and safety in industrial applications.
What is Ti-Pd Alloy Gr7?
Ti-Pd Alloy Gr7 is a titanium alloy with a small addition of palladium (typically 0.12%-0.25%). This alloy is specifically engineered to offer:
Exceptional Corrosion Resistance: Ideal for environments containing strong acids, chlorides, and seawater.
High Strength and Durability: Retains mechanical integrity under extreme conditions.
Biocompatibility: Non-toxic and safe for use in sensitive environments.
Compared to other grades like Gr2 or Gr5, Gr7's corrosion resistance gives it a significant edge for specific industrial applications.
Specifications of ASTM B338 Ti-Pd Alloy Gr7 Titanium Steel Pipes
ASTM B338 Grade 7 titanium steel pipes are designed to meet stringent requirements for high-performance applications. The following are key specifications that define these pipes:
Standard Specification
ASTM B338: Covers seamless and welded titanium and titanium alloy pipes for condensers, heat exchangers, and other industrial applications.
Grade: Gr7 (Ti-Pd Alloy).
Forms Available
Seamless Pipes: Used for applications requiring superior strength and pressure handling.
Welded Pipes: Ideal for lower-pressure applications and cost-effective solutions.
Dimensions
Outer Diameter (OD): Ranges from 6 mm to 114 mm (customized sizes available).
Wall Thickness: Ranges from 0.5 mm to 10 mm (depending on application).
Length: Typically up to 6 meters or as per customer requirements.
Compliance with ASTM B338 Standards
Pipes must adhere to the dimensional tolerances, surface finish, and testing protocols outlined in ASTM B338.
Grades: Gr7 is specifically defined for enhanced corrosion resistance in harsh environments.
Surface Finish Options
Pickled
Sandblasted
Polished
Chemical Composition of ASTM B338 Ti-Pd Alloy Gr7
The chemical composition of Grade 7 titanium is what makes it highly resistant to corrosion and suitable for extreme environments. Below is the standard composition for Gr7 as per ASTM specifications:
| Element | Composition (%) |
|---|---|
| Titanium (Ti) | Balance |
| Palladium (Pd) | 0.12 – 0.25 |
| Iron (Fe) | Max 0.30 |
| Oxygen (O) | Max 0.25 |
| Carbon (C) | Max 0.08 |
| Nitrogen (N) | Max 0.03 |
| Hydrogen (H) | Max 0.015 |
Mechanical Properties of ASTM B338 Ti-Pd Alloy Gr7
| Property | Value |
|---|---|
| Density | 4.51 g/cm³ |
| Tensile Strength | Min 345 MPa (50 ksi) |
| Yield Strength | Min 275 MPa (40 ksi) |
| Elongation at Break | Min 20% |
| Modulus of Elasticity | Approx. 105 GPa |
| Hardness | Approx. 160 HV |
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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