TA7 (Aerospace Titanium Alloy)

TA7 is a high-strength α+β type titanium alloy widely used in aviation and aerospace fields. It combines good specific strength, corrosion resistance, and excellent thermal stability, making it one of the important materials for manufacturing aircraft frames, spacecraft structural components, and critical load-bearing parts. Due to its unique properties, TA7 performs stably in extreme environments and is hailed as the "lightweight steel" of the aerospace industry.

Alloy Type: TA7 belongs to the two-phase (α+β) titanium alloys. Its composition is designed to balance toughness and strength while improving weldability and formability.

Performance Stability: This alloy maintains stable performance in both high and low-temperature environments and is commonly used for components carrying high stress, serving as an important foundational material in aerospace manufacturing.

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Application Overview:

Aviation: Primarily used for wing spars, fuselage frames, landing gear parts, and engine components.

Aerospace: Commonly used for rocket casings, satellite load-bearing structures, and critical connecting components.

Key Characteristics:

High specific strength (lightweight yet capable of bearing high loads).

Excellent corrosion resistance, suitable for marine or humid environments.

Stable thermal performance, able to withstand high temperatures and temperature fluctuations.

Good welding and machining properties.

Grades with performance similar to TA7 include the domestic TC4 (Ti-6Al-4V), and foreign grades like Grade 5 and BT6. These alloys are comparable in strength and toughness to TA7 but have slight differences in alloy element ratios and heat treatment characteristics.

Material Technical Standards
The production and inspection of TA7 typically follow national standards (GB/T), military standards (GJB), and specific aerospace industry regulations. Examples include:

GB/T 3620.1, GB/T 3620.2: Used for stipulating chemical composition and grades.

GJB Standards: Cover strength testing, mechanical properties, and process acceptance.

TA7 is melted using Vacuum Arc Remelting (VAR) or Vacuum Induction Melting (VIM) furnaces to ensure metal purity and reduce harmful impurities like oxygen, hydrogen, and nitrogen. For some high-end applications, triple melting technology is employed to further enhance microstructural uniformity and performance stability.

The typical composition range is:

Aluminum (Al): 5.5% – 6.8%

Vanadium (V): 3.5% – 4.5%

Remainder: Titanium (Ti) and trace impurities (Oxygen (O) ≤ 0.15%, Hydrogen (H) ≤ 0.015%, Iron (Fe) ≤ 0.30%).

Function: Aluminum improves heat resistance, while vanadium enhances strength and toughness.

The common process is solution treatment + aging:

Solution Treatment: 940°C – 960°C, hold for 1 hour, rapid cooling.

Aging Treatment: 480°C – 520°C, hold for 8 hours, air cooling.
This regime can significantly improve yield strength and fracture toughness.

After optimized heat treatment, the typical performance data for TA7 is:

Tensile Strength (σb) ≥ 900 MPa

Yield Strength (σ0.2) ≥ 830 MPa

Elongation (δ) ≥ 10%

Reduction of Area (ψ) ≥ 25%
It can maintain over 80% of its strength at 200°C.

TA7 has good hot workability, but plastic forming should be conducted within 600°C – 800°C to prevent cracking.

Welding: Atmosphere must be controlled during welding to avoid hydrogenation or oxidation.

Machining: Carbide or coated tools should be used.

Heat treatment for aerospace components is usually adjusted based on material and geometry.

Thin-walled parts tend to use lower-temperature aging to reduce distortion.

Thick-walled parts employ higher-temperature solution treatment for enhanced strengthening effects.

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Our factory operates a dedicated production facility equipped with modern machinery for processing titanium. We have a complete set of equipment including forging presses, hot and cold rolling mills, tube drawing and welding lines, bar & wire drawing machines, and surface treatment units. This allows us to control the production process from raw material to finished products such as sheets, plates, tubes, bars, and wires. Our workshop is capable of handling large-volume orders while maintaining consistent quality across our product range.

Our packaging is designed for maximum security and international standards. We use tailored wooden crates for heavy plates and bars, with internal waterproof wrapping and blocking to prevent movement. Tubes and coils are securely packed in wooden boxes with reinforced edges and protective end caps. For smaller items like wires and strips, we use standard export cartons with inner plastic and moisture-proof sealing. All packages are clearly marked with product details, weight, and handling instructions to ensure safe arrival. We can also customize packing methods, such as palletization or container optimization, based on specific shipping and customer requirements.

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