Technical Properties

Our stainless steels lend themselves to a whole range of transformation  possibilities for roofing and façade applications. 

 

Stainless steel has excellent mechanical characteristics

> Proof stress limits vary from one grade to another, they measure between 320N/mm² for an austenitic stainless steel, type 304 up to 620N/mm² for a Duplex stainless steel, enabling thinner gauges for the same resistance.

> The expansion coefficient varys from one grade to another. For ferritic stainless steels, it is around 1.1(mm/m per 100°C), a distinct advantage for roofing where the maximum continuous lengths allowed are greater than for other known materials commonly used.

> Stainless steel retains its mechanical properties, even at low temperatures and does not become fragile in temperatures below zero. This is a particular advantage in cold areas and makes stainless the material of choice for mountaineous areas.

> Stainless steel is an inflammable material. Creep temperatures are greater than a number of other metallic materials whose mechanical characteristics weaken at 650°C.

Stainless steel resists corrosion

The choice of grade and finish is made depending on the environment in which the building is exposed.

> It is important that the choice of surface finish be compatible with the environment.

Surface finishes with low surface roughness values such as UGINOX BRIGHT are the most corrosion resistant, less susceptible to contaminants and are more readily “self-cleaning”.

> Stainless steel is compatible with all types of wood and does not require a control layer or membrane between the stainless steel and the wood as is the case with other roofing materials.

More information, consult part corrosion