Ti-3Al-2.5V, commonly known as Grade 9 titanium, offering an optimal balance between the excellent corrosion resistance of commercially pure titanium and the superior strength of alloys like Ti-6Al-4V. This near-alpha titanium alloy provides 20-50% higher tensile properties than the strongest commercially pure titanium grades at both room and elevated temperatures while maintaining exceptional fabricability .
Our Ti-3Al-2.5V tubing is engineered for applications where weight savings, corrosion resistance, and structural integrity are paramount. With its unique combination of properties, Grade 9 titanium tube has become the material of choice for critical hydraulic systems, surgical implants, and high-performance sporting goods.
Chemical Composition and Material Structure
The exceptional properties of Ti-3Al-2.5V stem from its carefully balanced chemical composition:
*Table 1: Chemical Composition of Ti-3Al-2.5V (Grade 9) Titanium Alloy
|
Grade |
N |
C |
H |
Fe |
O |
Al |
V |
Mo |
Ni |
Ti |
|
Ti-3Al-2.5V(Grade 9) |
0.03 |
0.08 |
0.015 |
0.025 |
0.015 |
2.5-3.5 |
2.0-3.0 |
/ |
/ |
Balance |
This specific composition creates an α-β dual-phase microstructure that can be manipulated through thermomechanical processing to achieve desired mechanical properties. The aluminum content provides solid solution strengthening and stabilizes the hexagonal close-packed (HCP) alpha phase, while vanadium stabilizes the body-centered cubic (BCC) beta phase, enhancing room-temperature ductility and formability.
Key Properties and Advantages
Mechanical Properties
Ti-3Al-2.5V tubing offers superior mechanical properties compared to commercially pure titanium grades:
*Table 2: Typical Mechanical Properties of Ti-3Al-2.5V Tubing*
| Property | Annealed Condition | Cold Worked & Stress-Relieved |
|---|---|---|
| Tensile Strength | 620 MPa (90 ksi) min | 724 MPa (105 ksi) min |
| Yield Strength (0.2% Offset) | 520 MPa (75 ksi) min | 620 MPa (90 ksi) min |
| Elongation (in 4D) | 15% min | 10% min |
| Reduction of Area | 25% min | 20% min |
| Hardness (Rockwell B) | 80-90 HRB | 85-95 HRB |
The alloy demonstrates excellent strength-to-weight ratio, with tensile properties substantially higher than Grades 1-3 commercially pure titanium while maintaining good ductility and formability . This makes it ideal for weight-critical applications where both strength and formability are required
Physical Properties
*Table 3: Physical Properties of Ti-3Al-2.5V*
| Property | Value |
|---|---|
| Density | 4.48 g/cm³ (0.162 lb/in³) |
| Melting Point | 1604-1660°C (2920-3020°F) |
| Beta Transus | 935°C (1715°F) |
| Elastic Modulus | 105-115 GPa (15-17 x 10⁶ psi) |
| Thermal Conductivity | 8.5 W/m·K (5.9 BTU/ft·h·°F) |
| Coefficient of Thermal Expansion | 9.5 x 10⁻⁶/°C (5.3 x 10⁻⁶/°F) |
| Electrical Resistivity | 1.6 μΩ·m |
The relatively low density of Ti-3Al-2.5V provides significant weight savings compared to steel and nickel alloys, while its moderate thermal conductivity and thermal expansion characteristics make it suitable for various thermal applications .
Fabrication Characteristics
One of the most significant advantages of Ti-3Al-2.5V tubing is its superior fabricability compared to other titanium alloys:
Cold Formability: Excellent for bending, flaring, and swaging operations
Weldability: Highly weldable using GTAW (TIG), PAW, and EBW methods
Machinability: Better than Ti-6Al-4V with proper techniques and cooling
Heat Treatability: Can be age-hardened for additional strength
These fabrication characteristics make Grade 9 titanium tubing particularly suitable for applications requiring complex forming or joining operations .
Manufacturing Standards and Specifications
TSM TECHNOLOGY CO's Ti-3Al-2.5V tubing conforms to stringent international standards:
*Table 4: Standard Specifications for Ti-3Al-2.5V Tubing*
| Standard | Title |
|---|---|
| ASTM B338 | Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchangers |
| ASTM B861 | Standard Specification for Titanium and Titanium Alloy Seamless Pipe |
Our tubing is manufactured with precise dimensional control and undergoes rigorous quality assurance testing, including hydrostatic testing, ultrasonic inspection, and eddy current examination to ensure compliance with these specifications .
Manufacturing and Processing Considerations
Tube Manufacturing Process
At TSM TECHNOLOGY CO, we employ advanced manufacturing techniques to produce Ti-3Al-2.5V tubing:
Billet Preparation: High-quality titanium sponge is alloyed with aluminum and vanadium, then melted into ingots using vacuum arc remelting (VAR)
Extrusion or Piercing: The ingot is converted into hollows through extrusion or rotary piercing
Pilot Tube Production: Initial tube reduction through pilgering or drawing processes
Cold Working: Sequential cold reduction with intermediate annealing to achieve final dimensions and mechanical properties
Finishing Operations: Straightening, cutting, cleaning, and inspection
Heat Treatment Capabilities
We offer Ti-3Al-2.5V tubing in various heat treatment conditions:
Annealed: For maximum ductility and formability
Cold Worked and Stress-Relieved: For higher strength levels
Solution Treated and Aged: For optimized strength-toughness combination
The specific heat treatment can be tailored to achieve the optimal property balance for your application requirements.
Quality Assurance
Our comprehensive quality assurance program includes:
Chemical analysis verifying composition conformity
Mechanical testing confirming property requirements
Non-destructive examination (eddy current, ultrasonic, hydrostatic)
Dimensional verification per specification requirements
Surface condition evaluation and documentation
Traceability maintenance from raw material to finished tubing
Why Choose TSM TECHNOLOGY CO for Your Ti-3Al-2.5V Tubing Needs
At TSM TECHNOLOGY CO, we have established ourselves as a premier manufacturer and supplier of high-performance titanium tubing, with specialized expertise in Ti-3Al-2.5V alloys. Our commitment to excellence extends throughout the manufacturing process, from raw material selection to final inspection and delivery.
We maintain extensive inventory of standard sizes and grades, with capability to produce custom dimensions to meet your specific application requirements. Our technical support team includes materials engineers with deep knowledge of titanium processing and applications, ready to provide guidance on material selection, fabrication techniques, and application optimization.
Ti-3Al-2.5V tubing Factory in China
Contact us today to discuss your Ti-3Al-2.5V tubing requirements. Our technical sales team will provide detailed specifications, pricing, and delivery information to help you make the best material selection for your application.
faq
Q:1.What is the difference between Ti-3Al-2.5V (Grade 9) and Ti-6Al-4V (Grade 5) titanium?
A:Ti-3Al-2.5V offers superior cold formability and weldability compared to Ti-6Al-4V, while Ti-6Al-4V provides higher strength. Grade 9 is often selected for applications requiring complex forming operations, while Grade 5 is preferred for highest strength requirements .Ti-3Al-2.5V offers superior cold formability and weldability compared to Ti-6Al-4V, while Ti-6Al-4V provides higher strength. Grade 9 is often selected for applications requiring complex forming operations, while Grade 5 is preferred for highest strength requirements .
Q:2.Can Ti-3Al-2.5V tubing be welded?
A:Ti-3Al-2.5V is highly weldable using gas tungsten arc welding (GTAW/TIG), plasma arc welding (PAW), and electron beam welding (EBW) methods. Proper shielding is essential to prevent contamination during welding .
Q:3.What is the maximum service temperature for Ti-3Al-2.5V tubing?
A:Ti-3Al-2.5V maintains good mechanical properties at elevated temperatures, with useful service up to approximately 425°C (800°F) for short-term exposure and 315°C (600°F) for long-term service.
Q:4.Can Ti-3Al-2.5V tubing be bent or formed?
A:Ti-3Al-2.5V exhibits excellent cold formability, significantly better than Ti-6Al-4V. It can be successfully bent, flared, and formed using standard tube fabrication equipment with appropriate tooling and techniques.
Q:5.Is Ti-3Al-2.5V tubing suitable for medical implant applications?
A:Ti-3Al-2.5V is used in medical implants and is covered by ASTM F2146 for surgical implant applications. It offers excellent biocompatibility, corrosion resistance in bodily fluids, and good mechanical properties for implant devices.
Q:6.What quality certifications do you hold for Ti-3Al-2.5V tubing production?
A:We maintain certifications including AS9100 for aerospace, ISO 13485 for medical devices, and NADCAP for special processes. All tubing is supplied with full traceability and certification.
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