TA18
TA18 titanium alloy is a low-alloyed near-α titanium alloy with a nominal composition of Ti-3Al-2.5V. It is used as a pipe that can be cold processed.
Developed, it has good cold formability and welding performance. Its room temperature strength is 20%~50% higher than that of industrial pure titanium. It has good performance in many media. Corrosion resistance. The welding performance and cold forming performance of TA18 are better than those of TC4 alloy.
TA18 titanium alloy seamless pipe is suitable for aircraft and engine hydraulic and fuel piping systems. It has been used in various military and civilian aircraft and aerospace applications. Therefore, TA18 titanium alloy has become the most ideal material for making high-pressure resistant lightweight conduits on aircraft with its excellent comprehensive properties. It has become the ideal material for making high-pressure resistant lightweight ducts on aircraft.
Content
Chemical composition of TA18(%)
| TA18 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemicai composition | (WT%) | ||||||||||||
| (Ti) | remainder | ||||||||||||
| (Fe) | ≤0.25 | ||||||||||||
| (C) | ≤0.08 | ||||||||||||
| (N) | ≤0.05 | ||||||||||||
| (H) | ≤0.015 | ||||||||||||
| (O) | ≤0.12 | ||||||||||||
| (Al) | 2.0～3.5 | ||||||||||||
| (V) | 1.5～3 | ||||||||||||
| other impurity（singleness） | ≤0.1 | ||||||||||||
| other impurity （sum） | ≤0.4 |
Mechanical properties of TA18 alloy
| Mechanical properties at room temperature ≥ | TA1 | TA2 | TA3 | TA5 | TA6 | TA7 | TC1 | TC2 | TC4 | TC6 | TC9 | TC10 | TC11 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tensile Strength MPa | 343 | 441 | 539 | 686 | 686 | 785 | 588 | 686 | 902 | 981 | 1059 | 1030 | 1030 |
| Yield Strength σ0.2MPa | 275 | 373 | 461 | -- | -- | -- | -- | -- | 824 | -- | -- | -- | -- |
| Elongation δ5% | 25 | 20 | 15 | 15 | 10 | 10 | 15 | 12 | 10 | 10 | 9 | 12 | 10 |
| Shrinkage ψ % | 50 | 40 | 35 | 40 | 27 | 27 | 30 | 30 | 30 | 23 | 25 | 25~30 | 30 |
| Impact value αkJ/cm2 | -- | -- | -- | 58.8 | 29.4 | 29.4 | 44.1 | 39.2 | 39.2 | 29.4 | 29.4 | 34.3 | 29.4 |
| High temperature mechanical properties ≥ | |||||||||||||
| Test temperature °C | -- | -- | -- | -- | 350 | 350 | 350 | 350 | 400 | 400 | 500 | 400 | 500 |
| Tensile Strength σb MPa | -- | -- | -- | -- | 422 | 490 | 343 | 422 | 618 | 736 | 785 | 834 | 686 |
| Long-lasting strength σ100MPa | -- | -- | -- | -- | 392 | 441 | 324 | 392 | 569 | 667 | 588 | 785 | 588 |
Applications of TA18
1. TA18 titanium alloy seamless pipe is suitable for aircraft and engine hydraulic and fuel piping systems. It has been used in various military and civilian aircraft and aerospace applications,
2. TA18 titanium alloy has become the most ideal material for making high-pressure resistant lightweight ducts on aircraft due to its excellent comprehensive properties. become the most suitable Ideal material for lightweight, high-pressure resistant ducts on aircraft.
