Aluminium ENAW-AlMg0.7Si(A) Pipes & Tube(EU EN, DIN, WNR)

Product Description

EN AW-AlMg0.7Si(A) is the exact chemical designation for the high-strength aluminum alloy EN AW-6063A.

The "(A)" suffix indicates a tightly regulated chemical profile within the European standard (EN) framework. Designed to outperform standard 6063 (AlMg0.7Si) structurally, this alloy maintains the identical premier extrusion properties and exceptional anodizing quality required for thin-walled precision pipes and tubing.

Unified Cross-Reference Map

When reviewing international Material Test Certificates (MTCs), engineering schematics, or regional procurement logs, these designations indicate the same material footprint:

• EU Unified Standard: EN AW-6063A (Numerical) / EN AW-AlMg0.7Si(A) (Chemical)

• German Standard (DIN): DIN AlMg0.7Si (Modified)

• Werkstoff-Nummer (WNr): 3.32206 (Commonly shared with standard 6063 parameters but strictly verified for "A" mechanical tolerances)

• Global / US Nearest Alternative: AA 6063 (Note: Standard US 6063 permits a broader chemistry range; 6063A enforces a higher minimum yield threshold).

Technical Specifications for Pipes & Tubes

1. Chemical Composition (EN 573-3)

The "(A)" variant strictly regulates the Iron and Manganese margins. Controlling these elements minimizes microstructural variance, allowing the tube walls to precipitation-harden more uniformly during heat treatment.

2. Mechanical Boundaries in T6 Condition (EN 755-2)

When aged to the T6 condition (solution heat-treated and artificially aged), AlMg0.7Si(A) achieves a superior mechanical baseline over standard 6063.

• Tensile Strength ($R_m$): $\ge 230 \text{ MPa}$ (Base 6063 is typically $\ge 215 \text{ MPa}$)

• Yield Strength ($R_{p0.2}$): $\ge 190 \text{ MPa}$ (Base 6063 is typically $\ge 170 \text{ MPa}$)

• Elongation at Break ($A_{50mm}$): $\ge 5\%$ to $10\%$ (Depending on profile wall thickness)

• Brinell Hardness: $\approx 80 \text{ HBW}$

Structural Manufacturing Profiles

AlMg0.7Si(A) pipes and hollow profiles are selected according to the specific manufacturing standard that satisfies the mechanical intent of the layout:

Seamless Extruded Tubing (EN 755-7)

• Production: Pierced and extruded cleanly over a mandrel tool with zero longitudinal joint matrices.

• Engineering Context: Required for media-carrying piping systems with explicit internal hydraulic or pneumatic pressure ratings, structural elements exposed to torsional stress, or tubes destined for extreme end-forming (flaring, swaging).

Porthole / Structural Tubing (EN 755-8)

• Production: Extruded across a bridge matrix tool where the aluminum streams split and fuse metallurgically under heat and immense pressure.

• Engineering Context: Optimized for structural weight optimization including commercial vehicle frameworks, structural handrails, solar frame racking, and modular conveyor assemblies where fluid containment is not required.

Fabrication & Processing Benchmarks

• Anodizing Adaptability: Exceptional. Because the iron threshold is capped at a strict $0.35\%$, it eliminates cloudy optical defects, permitting highly consistent architectural clear or decorative color anodizing.

• Welding Capacity: Rated as excellent via standard TIG or MIG protocols. Standard filler materials include AA 5356 (highly recommended if post-weld anodizing is needed for uniform color matching) or AA 4043. Note: Welding reduces the local Heat Affected Zone (HAZ) properties back to a soft T4 baseline unless post-weld solution aging is performed.