ASTM B338 Grade 9 Titanium Seamless Tubing / 3Al-2.5V Alloy Pipe

As a leading Chinese manufacturer, ZHUOKE Material supplies high-precision ASTM B338 Grade 9 Titanium Seamless Tubing (also known as Ti-3Al-2.5V alloy). This alpha-beta titanium alloy bridges the gap between commercially pure titanium and Grade 5, providing extreme fatigue resistance, light weight, and excellent corrosion resistance. It is the premier standard for aerospace hydraulic systems, automotive racing components, and high-end bicycle frame building.

📊 Technical Specifications & Standards

Standard Specifications	ASTM B338, ASTM B861, AMS 4943, AMS 4945, ASME SB338
Grade / Alloy	Grade 9 (Ti-3Al-2.5V / UNS R56320 / W.Nr. 3.7195)
Outer Diameter (OD)	6.0 mm – 114 mm (Custom sizes available upon request)
Wall Thickness (WT)	0.5 mm – 10.0 mm
Length	Up to 12,000 mm (Cut-to-length & custom bending available)
Process Method	Cold Rolled / Cold Drawn & Annealed (Seamless)
Surface Finish	Acid Pickled, Polished, Bright Annealed, Sandblasted
Quality Testing	100% Eddy Current (ET) / Ultrasonic (UT), Hydrostatic Testing
MOQ & Lead Time	Small MOQ supported for standard sizes; Fast worldwide shipping

🔬 Chemical Composition & Mechanical Properties

• Chemical Composition: Al: 2.5%–3.5%, V: 2.0%–3.0%, Fe ≤ 0.25%, O ≤ 0.15%, Ti (Balance).
• Tensile Strength: ≥ 620 MPa (Annealed) / ≥ 860 MPa (CWSR)
• Yield Strength: ≥ 483 MPa (Annealed) / ≥ 725 MPa (CWSR)
• Elongation: ≥ 15% (Annealed) / ≥ 10% (CWSR)

💡 Key Advantages & Applications

• Bicycle Frame Building: Excellent weldability and fatigue strength, ideal for custom bike tubing, headtubes, and stay tubes.
• Aerospace & Hydraulics: High strength-to-weight ratio for hydraulic pressure lines.
• Chemical Processing & Marine: High corrosion resistance in brackish and mildly oxidizing environments.

🛡️ Quality Assurance & Certification

Every batch of Grade 9 titanium tubes comes with an EN 10204 3.1 Mill Test Certificate (MTC), including chemical composition and mechanical test results.