TA18 titanium alloy rod

TA18 (Ti-3Al-2.5V), often referred to in the industry as "semi-TC4," is a near-alpha titanium alloy specifically designed for cold working and welding. Its alloying element (Al, V) content is approximately half that of classic TC4 (Ti-6Al-4V), hence its name.

I. Product Introduction

1. Basic Information
Grade Conversion: GB TA18 = ASTM Grade 9 (GR.9)
Alloy Type: Near-α type titanium alloy (annealed state is mainly α phase, containing a small amount of β phase)
Nominal Composition: Ti - 3Al - 2.5V (titanium-based, containing approximately 3% aluminum and 2.5% vanadium)
Density: Approximately 4.51 g/cm³ (approximately 40% lighter than steel)
Common Conditions: Annealed (M), Cold-worked + Stress-relieved annealed
Maximum Operating Temperature: 315°C (long-term)

2. Core Properties
Mechanical Properties (Annealed State)
Tensile Strength: ≥ 620 MPa (20%~50% higher than industrial pure titanium)
Yield Strength: 780 ~ 860 MPa
Elongation: ≥ 18%
Hardness: Approximately 15 ~ 17 HRC Key Advantages
Excellent Cold Workability: Can be directly cold-bent, cold-rolled, and spun into complex thin-walled parts (such as thin tubes and sheets) without preheating.
Superior Weldability: Weld strength can reach 90%+ of the base material, far superior to TC4 (70%~80%).
Corrosion Resistance: Comparable to pure titanium, resistant to seawater, salt spray, chloride ions, and nitric acid corrosion.
Lightweight: High specific strength, significant weight reduction.

Comparison of TA18 (Semi-TC4) and TC4

II. Typical Application Areas

1. Aerospace (Core Applications)

Aircraft Piping Systems: Hydraulic, fuel, lubricating oil, air conditioning, and pressurized air piping (primary application)
Engine Components: Low-temperature (≤315°C) piping, exhaust pipes, corrugated pipes
Fuselage Structure: Honeycomb sandwich panels, thin-walled profiles, lightweight fasteners
Weight Reduction Benefits: Replaces stainless steel piping, reducing weight by 100~120 kg per aircraft.
2. Marine Engineering and Shipbuilding

Seawater Desalination: Heat exchanger tubes, evaporator tubes, corrosion-resistant pipelines

Shipbuilding: Exhaust pipes, seawater pipelines, pressure hulls for deep-sea exploration equipment

Offshore Platforms: Corrosion-resistant structural components and pipelines in chloride ion environments

3. Petrochemicals

Oil and Gas Extraction: Downhole casing, instrumentation pipes, and heat exchanger tubes resistant to hydrogen sulfide (H₂S) and carbon dioxide (CO₂)

Chemical Equipment: Reactors, condensers, and piping systems in nitric acid and organic acid media

4. Medical and High-End Civilian Products

Medical Devices: Orthopedic implants (bone nails, bone plates), surgical instruments (non-magnetic, sterilization-resistant)

Sports and Leisure: High-end bicycle frames, golf clubs, ski equipment

Automotive Industry: Lightweight connecting rods for racing cars, exhaust pipes, high-end car suspension components
 

Quality Control and Testing

Each product undergoes rigorous inspection before shipment:

Dimensional Inspection: Precise measurement of thickness, length, and width

Chemical Composition and Mechanical Property Analysis: Third-party testing reports

Surface Inspection: Visual and microscopic inspection for defects

Ultrasonic Testing: Detection of internal defects

Why Choose Us

Technology and Quality: Located in Baoji, China's Titanium Valley, we possess professional production technology and extensive experience in non-ferrous metal manufacturing.

Global Coverage: We provide consistently high-quality products to customers in Australia, South Korea, Germany, the USA, the UK, Malaysia, and the Middle East.

Quality Commitment: We never compromise on quality and are responsible for every product we manufacture.

Technical Support: We have professional personnel overseeing the entire process from raw materials to finished products!

Contact Us

Our team is dedicated to serving you and hopes that every product you purchase will meet your expectations!

Email: lucky@bjfreelong.com

WhatsApp: +86 13335371763

Please contact us for detailed quotations and technical specifications. We look forward to becoming your trusted high-end titanium materials partner.