Aluminium ENAW-AlCu4SiMg Plates & Sheets (EU EN, ISO)

Product Description

Standard Reference & Nomenclature

Under the European and International systems, the nomenclature is strictly defined:

• EN AW-2014A: The "AW" stands for Aluminium Wrought. The "A" suffix denotes a variation with specific control over impurity levels to ensure consistent mechanical performance.

• ISO AlCu4SiMg: The International Organization for Standardization uses the chemical symbols to define the alloy: Aluminum base + 4% Copper + Silicon + Magnesium.

Material Condition (Tempers)

For plates and sheets, the properties are determined by the heat treatment. The most common tempers found in the EU market are:

Mechanical Specifications (EN 485-2)

The European standard EN 485-2 defines the mechanical requirements for wrought aluminum sheets and plates.

Key Performance Factors

1. High Machinability

EN AW-AlCu4SiMg is renowned for its chip formation. Unlike softer alloys that "smear" or clog cutting tools, 2014A produces small, brittle chips. This allows for extremely high-speed machining and a superior surface finish that often requires no further polishing.

2. Sensitivity to Heat

While it is strong, its properties are sensitive to temperature.

• Operating Temp: It is typically used for components operating below 100C - 150C.

• Thermal Conductivity: High ($\approx 155 \text{ W/m·K}$), making it useful for certain heat-dissipating structural components.

3. Surface Protection Requirements

Because of the high Copper (Cu) content (up to 5%), this alloy is prone to intergranular corrosion. In the EU aerospace and defense sectors, it is standard practice to:

• Apply Chromic Acid Anodizing (CAA) or Sulfuric Acid Anodizing (SAA).

• Use Alclad sheets (a core of 2014A bonded to a skin of 99.5% pure aluminum).

Common Dimensions in EU Stock

• Sheets (Cold Rolled): 0.5 mm to 6.0 mm.

• Plates (Hot Rolled): 6.0 mm to 200 mm (often cut to size via waterjet or precision saw).

• Standard Sizes: 1250 x 2500 mm, 1500 x 3000 mm.

Summary Table: EN AW-2014A