Products Features
Excellent high-temperature strength and creep resistance (core advantage)
The core advantage of TA15 lies in its excellent high-temperature performance, which is its most distinctive feature distinguishing it from Gr5 (TC4) and Gr9 (TA18). A 6.5% aluminum content provides strong α-solid solution strengthening effects. The 2% zirconium further enhances the alloy's high-temperature strength through solid solution strengthening. The addition of 1% molybdenum and 1% vanadium, in appropriate amounts, improves the alloy's creep resistance and thermal stability while maintaining the stability of its near-α microstructure. TA15 retains high tensile strength and creep resistance at 500°C, with a long-term operating temperature far exceeding that of Gr5 (400°C) and Gr9 (350°C). This makes it an ideal material for high-temperature components in aircraft engines.
Excellent organizational stability
TA15 is a near-α titanium alloy. Due to the low additions of molybdenum and vanadium (approximately 1% each), it contains a small amount of β phase, resulting in excellent microstructural stability during long-term service below 550°C, with no significant coarsening of the α phase or decomposition of the β phase. This property is superior to that of α+β titanium alloys (such as Gr5), enabling extremely slow performance degradation and good dimensional stability under high-temperature long-term service conditions. It is therefore suitable for aerospace structural components requiring strict long-term reliability and predictable lifespan.
Good welding performance
TA15 has good welding performance. No complex preheating or post-weld heat treatment is required during welding, and the properties of the weld joint are similar to those of the base material. It can be connected using various methods such as TIG (Tungsten Inert Gas) welding, plasma welding, electron beam welding, and laser welding. During welding, inert gas (argon) must be used sufficiently to protect against high-temperature oxidation contamination.
Good corrosion resistance
Like all titanium alloys, TA15 relies on a dense, stable, and self-healing TiO₂ oxide film that forms spontaneously on its surface, exhibiting excellent corrosion resistance in atmospheric environments, seawater, chloride solutions, and most acidic media. Its corrosion resistance is comparable to that of Gr5, making it suitable for applications such as marine environments and chemical media.
Good hot working properties
TA15 has good hot working properties and can be formed through hot working processes such as forging, hot rolling, and hot extrusion within a temperature range of 900-1050°C. Annealing can be performed after hot working to achieve the optimal combination of microstructure and mechanical properties.
Good fatigue performance and fracture toughness
Exhibits excellent fatigue resistance and fracture toughness, particularly in bimodal and basket-weave microstructures. Its high-cycle fatigue performance and fatigue crack growth resistance are superior to those of most near-alpha titanium alloys. Through microstructure regulation, a flexible balance between strength, plasticity, and fracture toughness can be achieved, meeting the damage tolerance design requirements for aerospace structural components.
Technical Specifications
Chemical Composition(GOST 19807-91 / GB/T 2965)
|
Element |
Standard Requirements |
Notes |
|
Ti |
Remaining quantity(Matrix) |
Matrix elements, providing a lightweight matrix, excellent corrosion resistance, and organizational stability |
|
Al |
5.5 - 7.0% |
Core α-stable elements that significantly improve room temperature and high-temperature strength |
|
Zr |
1.5 - 2.5% |
Neutral solution-strengthening elements that enhance high-temperature strength and creep resistance |
|
Mo |
0.5 - 1.5% |
Beta-stable elements, when added in small amounts, improve high-temperature strength and creep resistance. |
|
V |
0.8 - 1.5% |
Beta-stable elements, when added in small amounts, improve the strength-ductility balance |
|
Fe |
≤ 0.25% |
Strictly control to avoid affecting corrosion resistance and high-temperature performance |
|
O |
≤ 0.15% |
Gap elements, which significantly affect the balance between strength and plasticity |
|
C |
≤ 0.10% |
Strict control; excessive levels will reduce plasticity |
|
N |
≤ 0.05% |
Gap elements, if too high, will reduce toughness |
|
H |
≤ 0.015% |
Strict control of hydrogen content to prevent hydrogen embrittlement |
|
Other elements (single) |
≤ 0.10% |
- |
|
Other elements (total) |
≤ 0.30% |
- |
Physical Properties
|
Property |
Value/Range |
Test Conditions |
|
Density |
4.45 g/cm³ |
Room Temperature (20°C) |
|
Melting Point |
≈ 1630°C |
- |
|
Coefficient of thermal expansion (20-400°C) |
9.0 × 10⁻⁶ /K |
- |
|
Elastic modulus (Young's modulus) |
≈ 115 GPa |
Room Temperature |
|
Thermal Conductivity (20°C) |
≈ 7.0 W/(m·K) |
- |
|
Resistivity |
≈ 1.70 μΩ·m |
- |
|
Poisson's ratio |
≈ 0.31 |
Room Temperature |
|
Magnetism |
Non-magnetic |
All titanium alloys are non-magnetic materials |
Mechanical Properties (Annealed Condition, Typical Values, GOST 19807-91 / GB/T 2965)
|
Property |
Typical Value |
Specification |
|
Tensile Strength |
≥ 885 MPa |
GB/T 2965 / GOST 19807-91 |
|
Yield Strength (0.2% Offset) |
≥ 780 MPa |
GB/T 2965 / GOST 19807-91 |
|
Elongation |
≥ 10% |
GB/T 2965 / GOST 19807-91 |
|
Reduction of cross-sectional area |
≥ 25% |
- |
|
Hardness (Brinell) |
290 - 340 HB |
- |
|
Impact Toughness (Charpy V-notch) |
25 - 45 J |
- |
Note: The strength level of TA15 is comparable to that of Gr5 (TC4), but its high-temperature performance (at 500°C) is significantly superior to Gr5's (at 400°C). It is suitable for aerospace structural components with higher requirements for medium-to-high temperature strength. Specific properties can be adjusted according to the customer-specified heat treatment conditions (annealing, double annealing).
Corrosion Resistance (Typical Value)
|
Medium |
Concentration |
Temperature |
Corrosion rate (mm/year) |
Rating |
|
Seawater |
- |
Room temperature to high temperature |
Ignored(＜0.01) |
Excellent |
|
Atmospheric environment |
- |
Room Temperature |
Ignored |
Excellent |
|
Nitric acid (HNO₃) |
10-40% |
Room Temperature |
＜0.05 |
Excellent |
|
Sulfuric acid (H₂SO₄) |
≤ 5% |
Room Temperature |
＜0.1 |
Good |
|
Hydrochloric acid (HCl) |
≤ 3% |
Room Temperature |
＜0.1 |
Good |
|
Sodium hydroxide (NaOH) |
10-50% |
Room Temperature |
＜0.05 |
Excellent |
|
Organic acids (such as acetic acid, citric acid, etc.) |
- |
Room Temperature |
＜0.1 |
Good |
Note: Titanium alloys have poor corrosion resistance in high-temperature concentrated sulfuric acid, hydrofluoric acid, and other media. The corrosion resistance of TA15 is comparable to that of Gr5 (TC4). For specific material selection, please provide detailed operating conditions, and we can assist with targeted corrosion assessment.
High-temperature performance
TA15 exhibits excellent high-temperature strength retention over a wide temperature range. The following are typical reference values for tensile strength as a function of temperature (annealed condition):
|
Temperature |
Tensile Strength (MPa) |
Performance retention rate |
Note |
|
Room Temperature (20°C) |
≥ 885 |
100% |
- |
|
350°C |
≈ 780 |
≥ 88% |
Extremely high performance retention rate |
|
450°C |
≈ 680 |
≥ 77% |
- |
|
500°C |
≈ 600 |
≥ 68% |
Core Advantage Temperature Range |
|
550°C |
≈ 520 |
≥ 59% |
Short-term exposure |
Long-term thermal stability and creep performance:
TA15 exhibits excellent microstructural stability during long-term service at temperatures ≤ 500°C, with no significant coarsening of the α phase or decomposition of the β phase, and possesses superior creep resistance. Due to the low addition levels of molybdenum and vanadium (approximately 1% each), the β phase content is lower and more stable, resulting in better long-term thermal stability than α+β titanium alloys (such as Gr5). This characteristic gives it a significant advantage in applications requiring long-term reliability, such as high-temperature components in aircraft engines.
Antioxidant performance:
TA15 can form a protective oxide film at temperatures below 550°C. In long-term exposure between 500-550°C, its oxidation resistance is better than Gr5. However, for long-term service at higher temperatures, protective coatings can be applied or titanium alloys with higher aluminum content can be considered.
Hot Working and Heat Treatment
Hot Working Properties:
TA15 has good hot working properties and can be hot worked and formed within the following temperature range:
|
Hot working method |
Recommended temperature range |
Note |
|
Forge |
950-1050°C |
Recommended final forging temperature is ≥ 850°C |
|
Hot Rolling |
900-1000°C |
- |
|
Hot extrusion |
950-1050°C |
- |
Treatment Regime:
The heat treatment of TA15 is mainly used to optimize the match between microstructure and performance, with common specifications as follows:
1. Annealing (the most commonly used condition for achieving optimal overall properties): Heat to 750-850°C, hold for 1-2 hours, then air cool. This results in an equiaxed or bimodal microstructure with good overall properties.
2. Double Annealing (used to improve creep and high-temperature endurance properties):
First stage: Heat to 850-950°C, air cool;
Second stage: Heat to 700-800°C, air cool.
This produces a bimodal or basket-weave microstructure with superior high-temperature performance.
Note: Heat treatment should be performed under vacuum or inert gas protection to prevent surface oxidation and contamination.
Applicable Media
1. Atmospheric environment: Excellent corrosion resistance, no need for surface coating protection.
2. Seawater and chloride solutions: Good pitting and crevice corrosion resistance.
3. Oxidizing acids: Such as nitric acid (medium to low concentration at room temperature), excellent corrosion resistance.
4. Weak reducing acids: Such as dilute sulfuric acid (≤5%), dilute hydrochloric acid (≤3%), can be withstood at room temperature.
5. Organic acids: Acetic acid, oxalic acid, citric acid, etc.
6. Alkaline solutions: Sodium hydroxide, potassium hydroxide, etc. (good corrosion resistance at room temperature).
7. Aviation kerosene, hydraulic oil: Good compatibility.
8. High-temperature air, gas atmosphere (≤500°C).
Note: TA15 is not resistant to strongly corrosive media such as hydrofluoric acid, high-temperature concentrated sulfuric acid, and concentrated hydrochloric acid.
TA15 (Ti-6.5Al-2Zr-1Mo-1V) is suitable for applications requiring a combination of medium-to-high temperature strength, excellent thermal stability, and corrosion resistance. It is recommended for use in the following fields:
Application Fields
-
Aerospace (Core Application Areas)
Aero-engine casings (compressor casings, intermediate casings), engine blades, aircraft frames, wing ribs, missile casings, rocket structural components, high-temperature fasteners, heat shields. -
Aerospace High-Temperature Piping
Aero-engine bleed air piping, environmental control system high-temperature piping, engine nacelle structural components. -
National Defense and Military Industry
Missile rudder structural components, aircraft skin, radar antenna structural components, unmanned aerial vehicle structural components. -
Automotive and High-Performance Industrial
High-performance engine exhaust systems, turbocharger components, high-temperature sensor sheaths, lightweight transmission components. -
Petrochemical and Energy
Medium-to-high-temperature corrosion-resistant piping, heat exchanger tube bundles, reactor internals, valve components (≤ 500°C). -
Marine Engineering
Ship seawater piping systems, deep-sea equipment structural components, seawater heat exchangers.
Delivery and Customization
We offer flexible and reliable supply chain solutions to ensure you receive TA15 (Ti-6.5Al-2Zr-1Mo-1V) materials that perfectly match your project requirements.
|
Form |
 Sheet/Plate
|
 Bar/Rod
|
 Pipe / Tube
|
 Strip/Sheet Coil
|
 Wire/Wire Rod
|
|---|---|---|---|---|---|
|
Conventional Range |
Thickness: 0.5 - 100 mm |
Diameter Φ6-500mm |
Outer diameter Φ10-300mm |
Thickness: 0.1 – 3.0 mm |
Diameter Φ0.5-10mm |
|
Customization Capability |
Hot-rolled plates, ultra-thin plates (starting from 0.1mm), fixed-length cutting, special surface treatments (pickling, sandblasting, polishing) |
Forged bars, hot-rolled bars, polished bars, shaped bars, and different heat treatment conditions (annealing, double annealing) |
Seamless tubes/ welded tubes, precision tube materials, large-diameter thick-walled tubes, tube end processing (beveling, fixed length), special lengths |
Different hardness conditions, special heat treatments (stabilization treatment, grain size control), acid-washed surfaces, electrolytic polishing, coatings, or special protective films |
Precision drawing, welding filler wire, special surface treatment |
Why Choose Us? - Reliable Engineering Technology. Dependable Delivery.
We are not just a supplier, but a trusted materials partner for you in China.
Vertically Integrated Production
Own 20,000㎡ facility with 10+ automated lines (8,000+ tons/year). In-house tooling & die center enables rapid customization and effective cost control - no middleman markup.
Strict Quality Control at Every Stage
Full traceability across key QC checkpoints throughout production. 100% compliant with ASTM/ASME, EN, and GB standards. Material test reports available with every shipment.
Reliable Delivery & Export Packaging
10+ years exporting to Europe, North America, Southeast Asia & Middle East with waterproof and anti-rust protection, combined with flexible shipping options ensures safe and on-time arrival.
Sample Validation Before Mass Production
We provide free samples for quality verification, allowing you to place bulk orders only after approval. We ensure consistency from sample to mass production by accurate dimensional measurement and transparent manufacturing.
FAQ
Q: What are the main advantages of TA15?
Q: What is the difference between TA15 and Gr5 (TC4)? How to choose?
Q: What is the difference between TA15 and Gr9 (TA18)? How to choose?
Q: What is the maximum operating temperature of TA15?
Q: What is the welding performance of TA15?
Q: Can TA15 replace Gr5?
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