TA18 Titanium Alloy: High-performance Corrosion-resistant Alloy

TA18 is a high-strength, highly corrosion-resistant titanium alloy, known as Ti-2Al-2.5Sn-3.7Zr-0.5Mo-0.3Si alloy, which is widely used in aerospace, marine engineering, high-performance sports equipment, and medical applications.
Features
1. High Strength: TA18 alloy can still maintain high strength under high temperature conditions, which is suitable for a variety of extreme working conditions.
2. Excellent corrosion resistance: Excellent performance in seawater and a variety of chemical media, suitable for use in harsh environments.
3. good wear and fatigue resistance: suitable for applications requiring stable operation over long periods of time.
4. Machinability: TA18 alloy has good machinability and can be machined by a variety of processes.
5. Lightweight: has a low density, which is conducive to the realization of lightweight design.
Mechanical Properties
- Tensile strength: approx. 900 MPa
- Yield strength: approx. 800 MPa
- Ductility: approx. 10%
- Hardness: approx. 250 HB
Physical properties
- Melting point: approx. 1660°C
- Coefficient of thermal expansion: approx. 8.6 x 10^-6/°C (20 to 100°C)
- Thermal conductivity: approx. 6.7 W/(m-K)

Processing method
1. Cold working: suitable for the manufacture of parts requiring high precision and surface quality, such as cold-drawing, cold-rolling and cold heading.
2. Hot processing: carried out under high temperature conditions, such as hot forging, hot rolling and hot molding, etc., applicable to the manufacture of large materials or complex shapes.
3. aging treatment: usually carried out at 500°C to 650°C, used to adjust the properties and organization of the material.
4. solution treatment: carried out at higher temperatures to dissolve the supersaturated solid solution in the alloy in preparation for subsequent treatment.
5. annealing treatment: carried out at temperatures lower than the solid solution treatment temperature, used to eliminate residual stresses and improve machinability.
6. Welding: can be carried out by TIG welding, MIG welding or electron beam welding, etc. The joints have high strength and good corrosion and fatigue resistance.
7. machining: including milling, drilling, turning, etc., need to pay attention to the selection of appropriate cutting tools and parameters.
8. EDM: Applicable to the processing of workpieces with complex shapes and high precision requirements.
Application fields
- Aerospace: used to manufacture aircraft structural parts, engine parts, etc.
- Chemical industry: manufacturing corrosion-resistant chemical equipment and reactors.
- Medical: Manufacture of artificial joints, dental implants and other medical devices.
- Marine engineering: used in seawater treatment equipment, marine platform structures, etc.