2A12 Aluminum Square Tube

2A12 aluminum square tubes are square-section tubes extruded from Al-Cu-Mg series high-strength hard aluminum (2000 series), formerly designated LY12, with an international approximate designation of 2024, conforming to GB/T 3191 standard. They contain 3.8%-4.9% copper and 1.2%-1.8% magnesium, and can be heat-treated for strengthening. In the T4 condition, the tensile strength is ≥420MPa, demonstrating strong load-bearing capacity.

Core Characteristics

Advantages: High strength, excellent fatigue resistance, stable performance at moderate temperatures (≤150℃)

Limitations: Moderate corrosion resistance, requires anodizing/painting/aluminizing for enhanced protection; prone to intergranular cracking during argon arc welding, good spot weldability

Machining: Moderate plasticity in annealed state, good machinability after quenching

Specifications and Applications

Common cross-sections: 10×10~200×200mm, wall thickness: 1~10mm, length: 6~12m (custom lengths available); Primarily used for high-load aerospace components (aircraft frames, spars, skins), rail transit load-bearing components, and high-end mechanical structural components; suitable for applications with extremely high strength and lightweight requirements.