Alumineu uses primary EN AW-6063 T5 aluminium for precision-extruded profiles. The alloy supports consistent geometry, surface quality and heat dissipation across batches.
What the grade means
EN AW-6063 is an aluminium-magnesium-silicon alloy. It suits complex extrusions, architectural components and subsequent coating. EN 573-3 governs chemical composition, EN 755-2 mechanical properties and the EN 755 series tolerances.
T5 denotes cooling after forming followed by artificial ageing. The grade alone does not make a good profile: die design, wall thickness, process control, dimensional inspection and coating also matter.
Why primary feedstock
Primary aluminium is produced from alumina and then alloyed to a controlled composition. Alumineu selects it to control feedstock and repeat production results.
Secondary aluminium can also meet EN AW-6063 with sorting, cleaning and melt-by-melt control. “Primary good, secondary bad” is therefore inaccurate. The difference lies in how the producer controls impurities and consistency.
What the installer notices
Quality appears in cutting, drilling, bending and joining long sections. Channels must retain their shape, joints align without steps and coatings remain even. The alloy supports these properties but does not replace sound design and processing.
In a lighting profile, aluminium also accepts heat from the LED strip and spreads it through the body. Typical thermal conductivity for EN AW-6063 is around 200–220 W/(m·K). Actual temperature depends on section, strip contact, power and installation. See Polycarbonate diffusers.
Frequently asked questions
Is secondary aluminium always worse? No. Controlled secondary feedstock can meet the same standard. Alumineu chooses primary for production consistency.
What does the customer pay for? Geometry, predictable installation, surface quality and profile performance, including heat dissipation in lighting systems.