The prince of the elements, an exceptional metal.

The prince of the elements, an exceptional metal.
For 60 years, aluminum has been an ally of Metra: a profound knowledge of the raw material and the entire production chain.
Decades of updating, investments in technology and know-how that make the difference.

Why aluminum?
Aluminum is one of the most common elements in nature and one of the cheapest in terms of energy production cost.
It is a light and eco-sustainable metal, it can be 100% recycled and for an infinite number of times while retaining its characteristics.
It is resistant to corrosion and can be easily worked at high and low temperatures.

Aluminum is characterized by a high electrical, thermal and sound conductivity and it has a reflective capacity that promotes energy savings.

Aluminum alloys
The Metra team guarantees maximum competence in the selection of the most suitable aluminum alloys for the different markets and individual projects. In fact, aluminum extrusion can concern various types of alloys, selected on the basis of the use of the extrusion and the required mechanical strength.

We always pay particular attention to environmental issues, among Metra Industry aluminum alloys our customers can choose the greenest and “low carbon” ones.

EN AW-6060

The alloy EN AW-6060 is the most common extrusion alloy on the European market, due to its high-speed thermal deformation properties.

This allows sections to be created with even complex sections, including multiple cavities and grooves, to bring the extrusion design as close as possible to that of the finished product, and thus minimize intermediate machining.

EN AW-6063

Extruded products in EN AW 6063 aluminium alloy are used in conditions of accentuated corrosion, where, moreover, mechanical strength is an essential requirement, albeit with medium-low numerical values, or for secondary level structural functions.

EN AW-6106

The alloy EN AW 6106 is an excellent compromise in response to demands for good mechanical strength, good weldability, high complexity of shape of the profile section, reduced wall thickness for hollow extrusions, good surface finish.

Its fields of application range from automotive structures (space frames) to railway (carriage structures) and naval applications.

EN AW-6005A

Extruded products in EN AW 6005 A aluminium alloy are used in the sectors of manufacturing, construction and engineering in general, which require medium mechanical strength, even for welded parts, combined with good corrosion resistance.

The chemical composition and production processes adopted make this alloy harden easily; this means the mechanical properties are also extended to those parts of the profile not fully exposed to heat exchange.

EN AW-6061

Among the alloys used for structural applications, the alloy EN AW 6061 is very widely used thanks to the medium-high strength achieved following heat treatment (hardening and artificial ageing).

It is most frequently used to produce bolts and rivets, standard profiles for precision machining, civil structures (bridges, towers, pylons), structural parts of means of transport (truck frames, naval structures, railway carriages, aeronautical applications).

EN AW-6082

Extrusions in the alloy EN AW-6082 are used as components of structures and machinery that require high strength and mechanical rigidity, combined with acceptable corrosion resistance. The chemical composition and extrusion parameters are formulated to allow the creation of profiles with sections of average complexity, including cavities and grooves.

EN AW-3103

The alloy EN AW-3103 is used in constructions where there is a greater requirement for corrosion resistance than for mechanical strength, i.e. where there is the need to minimize the chemical reaction between the metal and the surrounding fluids, whether these be food, the atmosphere or technical fluids that need to be chemically preserved.

Extrusions in this alloy are mainly used in pipes and machinery for the chemical, food and refrigeration industry.