Alliage d aluminium

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Relative density 
Varies between 2.7 and 2.9 g/cm3, according to the alloy components. 

Corrosion resistance 
Aluminum forms a natural surface protection layer on context with air. This layer is always reconstituted after removal, providing outstanding resistance to atmospheric corrosion. Pure and very pure aluminum, and also non-copper alloys, are resistant to a very large number of media. For this reason, they are widely used in the construction and chemical industries, the food and beverage industry and for vehicle construction. However the aluminum-based materials with the highest strength ratings – over 500 N/mm2 – have very limited resistance. This has to be compensated by structural design solutions. 

Cold and hot forming properties 
Aluminum is characterised by a relatively high deformation resistance. Given the use of appropriate technical plants, however, aluminum and its alloys display good to very good cold- or hot-forming properties over a broad spectrum: 
• extrusion
• drawn
• casting.

Good conductor of electricity and heat 
Aluminum has a high electricic conductivity (38 to approx. 34 m/Ohm mm² for pure aluminum). The materials used for electrical conductors in practice are mainly pure aluminum and E-AlMgSi materials. The heat conduction level, at approx. 80 to 230 W/m o K is approx. four times that of iron.

Magnetic properties 
Aluminum is not magnetic – an important property in the context of electrical engineering, electronics and mechanical engineering. 

Surface treatment 
A range of surface treatment options are available for aluminum, providing excellent adaptability for virtually any application. 

• Anodisation decorative surfaces - wide range of colours surfaces of technical plant and equipment - wear-resistant 
• Powder coating in many colour shades - according RAL 
• Wet-spray painting in many colour shades - according RAL 
• Polishing - mechanical and chemical 
• Grinding and brushing etc. 


High reflectivity 
Aluminum surfaces are naturally good reflectors of light and heat. A number of surface treatments can be applied to adjust the reflectivity and absorption characteristics over a wide range of values. 

Jointing techniques 
Almost all normal jointing techniques can be used for aluminum and its alloys. 

No health hazards 
According to current medical knowledge, aluminum is completely free of health hazards. 

Recyclability 
As used in the industry, the term “recycling” relates specifically to the re-use of scrap and used manufactured products as secondary raw material for the manufacture of new products. Over 1/3 of all aluminum raw materials in use have been produced from appropriate recycling processes, without any loss of quality. Only 5% of the energy required for primary aluminum production is needed for recycling processing. Given the choice between several possible materials, aluminum will often be the most environmentally-friendly and economic option.