Gr9 Titanium Seamless Tube
Name: Titanium Seamless Tube
Material:Ti-3Al-2.5V
Standard: ASTM B338/ASTM B861
Surface Treatment: Pickled and Polished
Specification: fixed specification and tailor-made specification
Description
Technical Parameters
Introduction
Gr9 titanium seamless pipes ,also known as Ti-3Al-2.5V or TA18 in Chinese standards are a near-α titanium alloy with excellent cold formability, weldability, and corrosion resistance.
Gr9 (Ti-3Al-2.5V) is an alpha-beta titanium alloy with 3% aluminum and 2.5% vanadium. It is a seamless tube made via hot extrusion or cold rolling, featuring a balance of strength, formability, and corrosion resistance. It sits between commercially pure titanium (Gr1-4) and high-strength Gr5 (Ti-6Al-4V) in performance.
Typical Dimensions
|
Parameter |
Range |
Standard Length |
|
Outer Diameter |
1 mm - 250 mm |
3m, 6m, up to 12m |
|
Wall Thickness |
0.1 mm - 20 mm |
SCH 10 to XXS |
|
Tolerance |
OD: ±0.05-0.15 mm |
Depends on size and wall thickness |
|
WT: ±5-10% |
Applications
Aerospace & Defense
- Hydraulic and fuel lines for aircraft
- Instrumentation tubing
- Airframe structural components
- Satellite propulsion systems
Consumer & Sports Equipment
- High-performance bicycle frames
- Wheelchair frames
- Golf club shafts
- Marine hardware
Chemical Processing
- Heat exchanger tubes
- Condenser and evaporator tubing
- Chlor-alkali industry piping
- Desalination plant components
Medical Devices
- Surgical instruments
- Implantable devices
- Diagnostic equipment components
- Dental instruments
Oil & Gas
- Offshore platform piping
- Subsea control lines
- Downhole instrumentation tubes
Manufacturing Process
1. Melting: Vacuum arc remelting (VAR) or electron beam melting (EBM) for high purity
2. Forging: Break down ingot into billets
3. Piercing: Create hollow shell from billet (mandrel mill or plug mill process)
4. Rolling: Reduce OD/WT to desired dimensions (cold rolling for thin walls)
5. Annealing: Heat treat to achieve specified mechanical properties
6. Finishing: Cut to length, surface treatment, NDT inspection
7. Testing: Hydrostatic, ultrasonic, eddy current, and visual inspection
Comparison with Similar Alloys
|
Property |
Gr9 |
Gr2 |
Gr5 |
|
Strength |
Intermediate |
Low |
High |
|
Cold Formability |
Excellent |
Excellent |
Poor |
|
Weldability |
Excellent (90% joint efficiency) |
Excellent |
Good (70-80% joint efficiency) |
|
Cost |
Moderate |
Low |
High |
|
Best For |
Thin-walled tubes, welded structures, cold-formed parts |
Corrosion-resistant applications |
High-stress components, high-temp service |
FAQ about Gr9 Titanium Seamless Tube
Questions for product use
Is Gr9 resistant to corrosion?
Excellent in:
Seawater, brines, saltwater;
Oxidizing acids, alkaline solutions, moist chlorine;
Chloride environments;
Avoid: Strong reducing acids, fluoride solutions, pure oxygen, anhydrous chlorine.
What welding methods are recommended?
Primary: GTAW with pure argon shielding.
Key: Back shielding required; weld width ≤2 mm; no porosity/incomplete fusion.
Filler metal: Gr9 matching wire.
What surface finishes are available?
Pickled (standard, remove oxide scale)
Sandblasted (matte, industrial)
Polished (Ra ≤0.8 μm, chemical/electrolytic)
Custom (coated, machined)
What are common defects & prevention?
Surface scratches: Handle with gloves; use protective wrapping during transport.
Wall thickness variation: Control piercing/rolling parameters; use precision dies.
Weld porosity: Ensure clean surfaces; adequate argon shielding; dry filler metal.
Hydrogen embrittlement: Keep H ≤0.015%; avoid high-humidity welding environments.
What NDT methods are used?
Ultrasonic testing: Detect internal cracks/inclusions
Eddy current testing: Surface/subsurface defects
Radiographic testing: Weld quality inspection
How to store & handle Gr9 tubes?
Storage: Dry, clean environment; avoid contact with steel/iron.
Handling: Wear gloves; avoid dropping/impacts; use non-metallic slings.
Contact
Ruihang Group mainly produces Titanium and Titanium Alloy products with the complete industry chain,including smelting,forging, straightening,rolling,surface treating,testing process.
Ruihang,as a professional manufacturer, is specialized in R&D,production and sales for titanium and titanium alloy products,includingtitanium &titaniumalloy Plate/Sheet, Bar, Pipe, Ring, Forging Stock & Section.The quality carried to the standard of AMS, ASTM, MIL, ISO, GB, GJB.If you need titanium as the raw material for further production, please don't hesitate to contact us.
E-mail: Sam.Rui@bjrh-titanium.com Hannah@bjrh-titanium.com
Address: No.16, Industrial Avenue East,, Baoji City, Shaanxi Province, CHINA
Contact: Mr. Sam/Ms.Hannah
Phone: +86 186 9515 4391
Mobile/WhatsApp: +86 153 19276 123
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