2014 - AlCuSiMg Aluminium Plates & Sheets (DIN, WNR)

Product Description

2014 Aluminium (AlCu4SiMg) is a high-strength, heat-treatable alloy from the 2000 series (Aluminium-Copper family). Often referred to as "Aviation Grade," it is one of the strongest aluminium alloys available, offering excellent hardness and mechanical properties, though it requires protection against corrosion.

1. Key Designations and Equivalents

2. Chemical Composition (Typical %)

The addition of Copper provides significant strength through heat treatment, while Silicon and Magnesium improve the alloy's response to artificial aging.

• Copper (Cu): 3.90 “ 5.00%

• Silicon (Si): 0.50 “ 1.20%

• Magnesium (Mg): 0.20 “ 0.80%

• Manganese (Mn): 0.40 “ 1.20%

• Aluminium (Al): Remainder

3. Mechanical Properties (T6 Temper)

The T6 temper (solution heat-treated and artificially aged) is the most common state for 2014 plates and sheets to maximize strength.

4. Physical Properties

• Density: 2.80 $g/cm3$ (slightly heavier than 5000/6000 series due to copper)

• Melting Range: 505C “ 640C

• Thermal Conductivity: 155 W/m·K

• Modulus of Elasticity: 73 GPa

5. Common Applications

2014 is used where an extremely high strength-to-weight ratio is required, but where environment-driven corrosion is not the primary concern.

• Aerospace: Aircraft structures, skins, and frames.

• Military: High-strength transport components and rocket motor cases.

• Heavy Industry: Forged hydraulic cylinders, cylinders, and pistons.

• Automotive: High-performance wheels and structural frames.

6. Fabrication & Characteristics

• Machinability: Excellent. It produces small, broken chips and a high-quality surface finish, making it a favorite for precision-turned parts.

• Weldability: Poor. It is generally considered difficult to weld via arc welding (MIG/TIG) due to the risk of hot cracking. It is more commonly joined by rivets or mechanical fasteners.

• Corrosion Resistance: Low. Because of the high copper content, it is susceptible to atmospheric corrosion. In many applications, it is Clad (layered with pure aluminium) or anodized for protection.

7. Comparison: 2014 vs. 5083