The ASTM B338 GR9 Tube is a high-performance titanium alloy tube made from Ti-3Al-2.5V, also known as Grade 9 Titanium. This alloy combines the lightweight and corrosion-resistant characteristics of commercially pure titanium with enhanced strength from alloying elements aluminum (Al) and vanadium (V). Manufactured according to ASTM B338 standards, the GR9 Seamless Titanium Tube offers an optimal balance of strength, ductility, and workability, making it a preferred choice in aerospace, marine, chemical, and high-end engineering applications.
Alloy Composition and Material Characteristics
Ti-3Al-2.5V alloy is composed of approximately:
Titanium (Ti): Balance
Aluminum (Al): 2.5%–3.5%
Vanadium (V): 2.0%–3.0%
This Grade 9 Titanium Tube is classified as an alpha-beta alloy, which provides superior mechanical performance compared to commercially pure titanium grades such as Grade 2, while retaining good corrosion resistance.
Key properties of ASTM B338 GR9 Tube:
High strength-to-weight ratio – ideal for applications requiring both durability and weight reduction.
Excellent corrosion resistance – suitable for harsh marine and chemical environments.
Outstanding weldability – supports TIG, MIG, and plasma arc welding processes.
High fatigue strength – reliable for dynamic load applications.
Mechanical Properties
| Property | Typical Value | ASTM B338 Minimum Requirement |
|---|---|---|
| Tensile Strength (MPa) | 620–654 | ≥ 620 |
| Yield Strength 0.2% (MPa) | 483–503 | ≥ 483 |
| Elongation (%) | 20–27 | ≥ 15 |
| Modulus of Elasticity (GPa) | ~ 105 | - |
| Density (g/cm³) | 4.48 | - |
Manufacturing Process
Our ASTM B338 GR9 Tube is produced using precision-controlled manufacturing steps to ensure uniformity and reliability:
Billet Preparation – Titanium alloy billets are forged and inspected for internal defects.
Extrusion or Rotary Piercing – The billet is formed into a hollow tube.
Cold Drawing – Achieves final dimensions and enhances mechanical properties.
Annealing – Heat treatment for optimal ductility and reduced residual stresses.
Surface Finishing – Pickling or polishing to ensure a smooth, defect-free surface.
Final Inspection – Ultrasonic, eddy current, and hydrostatic testing according to ASTM B338.
Available Sizes and Customization
We offer Grade 9 Titanium Tubes in a wide range of sizes to meet diverse engineering requirements:
Outer Diameter (OD): 6 mm – 114 mm
Wall Thickness: 0.5 mm – 10 mm
Length: Up to 6 meters, custom lengths available
Tolerance: ±0.05 mm for OD, ±0.02 mm for wall thickness
Corrosion Resistance
The Ti-3Al-2.5V Tube exhibits exceptional corrosion resistance in:
Seawater – No pitting or crevice corrosion even in long-term immersion.
Oxidizing environments – Excellent performance in aerated conditions.
Mild reducing acids – Stable in environments such as dilute hydrochloric acid.
Chloride-containing solutions – Resistant to stress corrosion cracking.
This makes the ASTM B338 Titanium Tube an optimal choice for marine, offshore, and chemical processing industries.
Applications
The versatility of ASTM B338 GR9 Tube is reflected in its broad application spectrum:
Aerospace
Hydraulic and pneumatic systems
Fuel and exhaust lines
Aircraft structural components
Marine
Boat frames and masts
Offshore platform tubing
Desalination plant piping
Chemical Industry
Heat exchanger tubing
Process piping for corrosive fluids
Condenser systems
Sports and Recreation
High-performance bicycle frames
Golf club shafts
Lightweight camping gear supports
about us
We are a leading manufacturer and exporter specializing in Titanium and Titanium Alloy products. Our company is dedicated to providing a comprehensive range of high-quality titanium solutions for demanding global industries such as Aerospace, Chemical Processing, Medical, Marine Engineering, Power Generation, and Sports Equipment.
Our core export portfolio encompasses the full spectrum of wrought titanium products, including:
Titanium Tubes & Pipes: From precision Thin-Walled Titanium Tubes for heat exchangers to robust Thick-Walled Titanium Pipes for high-pressure applications.
Titanium Plates & Sheets: Supplied as Titanium Plates for heavy-duty construction and Titanium Sheets / Titanium Foils for precise manufacturing.
Titanium Bars & Rods: We supply Titanium Bars, Titanium Rods, and Titanium Wires in various diameters and finishes.
Titanium Fasteners: A complete range of Titanium Fasteners including bolts, nuts, and studs.
We expertly process all common grades to meet diverse operational requirements, including:
Commercially Pure Titanium: Gr1, Gr2
Titanium Alloys: Gr5 (Ti-6Al-4V), Gr7, Gr9 (Ti-3Al-2.5V), Gr12
Our production and quality assurance strictly adhere to international standards such as ASTM B265, ASTM B337, ASTM B338, ASTM B348, ASME SB-363, and AMS 4902, ensuring superior performance, excellent corrosion resistance, and high strength-to-weight ratio in every product.
Leveraging our advanced manufacturing expertise and stringent quality control, we are your trusted global partner for reliable, high-performance titanium materials.
