TC18 Titanium Alloy Rod

TC18 Titanium Alloy rod is a high-strength titanium alloy developed by the All-Russian Institute of Aviation Materials in the 1960s. Its corresponding Russian alloy grade is BT22. The nominal composition of TC18 titanium alloy is Ti-5Al-5Mo-5V-1Cr-1Fe. In the annealed state, its microstructure contains approximately equal amounts of α phase and β phase, making it the strongest titanium alloy in the annealed condition.

After strengthening through heat treatment, the tensile strength of TC18 titanium alloy bars can reach 1300 MPa, and the thickness of the strengthened section can be as much as 250 mm. The alloy is capable of long-term operation at temperatures up to 400°C.

Due to its advantages of high strength, high plasticity, and good hardenability, TC18 titanium alloy is widely used in the manufacturing of aviation load-bearing structural components. It is particularly well-suited for the production of large structural parts in aircraft fuselages and landing gear assemblies. TC18 is often used as a replacement for high-strength steel or Ti-6Al-4V alloy in aircraft structures.

The main semi-finished products of TC18 alloy include plates, bars, tubes, fasteners, extruded profiles, and forgings.

Chemical composition of titanium alloy

Mechanical properties of  titanium alloy rod at room temperature

Process 1 Flow:
Raw material → Blanking → Free forging (rough forging) → Die forging (pre-forging, quasi-β forging) → Heat treatment

Process 2 Flow:
Raw material → Blanking → Free forging (rough forging) → Die forging (pre-forging, quasi-β forging) → Heat treatment

Free forging and die forging are performed using our company's 31.5 MN fast forging machine and 400 MN die forging hydraulic press, respectively. Heat treatment is conducted in our trolley-type heat treatment furnace, which maintains a temperature uniformity of ±5 °C.

For both processes, the free forging temperature is Tβ – 35 °C.

In Process 1, the forging speed is 10 mm/s, and the quasi-β forging temperature is Tβ + 18 °C.

In Process 2, the forging speed is 15 mm/s, and the quasi-β forging temperature is Tβ + 10 °C.

The deformation amount and the number of forging heats are consistent across both processes.

Heat Treatment System for Both Processes:

Heat to 840 °C, hold for 180 minutes

Cool with the furnace to 760 °C, hold for 150 minutes, then air cool

Reheat to 620 °C, hold for 6 hours, then air cool

1. Chemical composition analysis: It is carried out in accordance with GB/T4698 standard.

2. Room temperature tensile test: by GB/T228 standard.

3. High temperature tensile test: by GB/T4338 standard.

4. High temperature endurance test: by GB/T2039 standard.

5. Ultrasonic flaw detection: by GB/T5193 standard.

Hot Tags: tc18 titanium alloy rod, China tc18 titanium alloy rod manufacturers, suppliers, factory, high quality titanium rod, titanium foil, titanium coil, gr7 titanium sheet, m7 titanium bolt, titanium rod