6063 - AlMg0.7Si Aluminium Bar & Rod (DIN, WNR)

Product Description

1. International Standard Equivalents

The designation AlMg0.7Si is primarily used under the European and German standardizing bodies. Here is how it cross-references globally:

• WNr (Werkstoffnummer): 3.3206

• EN/DIN: EN AW-6063 (AlMg0.7Si)

• ISO: Al-Mg0.7Si

• AISI/SAE (US): 6063

• AFNOR (France): A-GS

• JIS (Japan): A6063

2. Chemical Composition

6063 is a silicon-magnesium-based alloy heat-treated for architectural and structural applications. The "0.7Si" in the DIN name highlights the specific balancing of magnesium and silicon to optimize the formation of the $Mg_2Si$ strengthening precipitate.

3. Typical Mechanical Properties (Bar & Rod)

The mechanical performance of 6063 bar and rod depends heavily on the temper condition. The most common commercial tempers for this profile are T5 (cooled from an elevated temperature shaping process and artificially aged) and T6 (solution heat-treated and artificially aged).

4. Key Performance Characteristics

• Extrudability: 6063 is widely considered the premier alloy for complex extrusions. It flows exceptionally well through dies, allowing for intricate solid and hollow bar profiles with excellent dimensional tolerances.

• Surface Finish: It yields an exceptionally smooth surface finish, making it the industry standard for decorative or architectural anodizing (clear, color, or hard coat).

• Corrosion Resistance: It offers excellent resistance to atmospheric corrosion, even in marine environments.

• Weldability: It is easily welded using TIG or MIG processes, though welding will locally reduce the mechanical properties near the heat-affected zone (HAZ) to a T4 or O-temper equivalent unless post-weld heat treatment is applied.

5. Primary Applications

Because 6063 prioritizes surface quality, extrudability, and corrosion resistance over raw high strength (unlike its cousin 6082 or 6061), it is typically utilized in:

• Architectural frameworks, window frames, and door profiles.

• Electrical busbars, conduits, and heat sinks due to its solid electrical and thermal conductivity.

• Lightweight structural frames, railings, and trim for marine and automotive assemblies.