| Stainless steel is an alloy based on iron, which | | | | Over the years, new productive technologies |
| combines together the mechanical properties of | | | | have been developed that, using the processes of |
| steels and some specific features of corrosion | | | | stainless steel welding to weld steel pipes, make |
| resistance. These alloys are also liable to tarnish. | | | | possible to market a product of the highest |
| This means that they have the possibility to | | | | quality. It is thanks to the technology of |
| passivate, that means to get covered with an | | | | high-frequency welding that in the stainless steel |
| invisible layer of oxides that protects the | | | | pipe, the heat affected zone and known as the |
| underlying metal from corrosive attacks. Stainless | | | | most sensitive to corrosion, has been reduced by |
| steel is the name given to a type of steel with | | | | section and then, for the same alloy, it provides a |
| high chromium contents that thanks to this | | | | lower propensity to oxidation on the surface. |
| feature does not rust when exposed to water | | | | Stainless steel is still refined and adapted to the |
| and air. They are a very important class of steels, | | | | demands of various industries like petroleum, |
| used in countless applications. In fact, nowadays | | | | petrochemical, mining, energy, nuclear, food and |
| both stainless steel furniture and construction | | | | obviously building. A lot of machines are built with |
| machinery are very popular. | | | | parts made of steel, from pipes to sheet to steel |
| The discovery of this type of steel is due to | | | | trolleys. |
| Harry Brearly, who while was experimenting with | | | | For over 70 years stainless steel is used for |
| various types of alloys for the reeds of guns, | | | | external cladding of buildings. |
| noticed that a type of steel with a certain | | | | Thanks to the advances in processing and finishing |
| percentage of chromium did not get rusted when | | | | technologies of stainless steel, the architects now |
| exposed to the atmosphere. Later this property | | | | have a wide range of high quality and high |
| was explained by the passivation of chromium, | | | | resistance stainless steel. This is also thanks to |
| which forms a very thin oxide film on the | | | | the characteristics of steel, a highly ductile, flexible |
| surface, continuous and stable. The following | | | | and easily adaptable material. And that can be |
| progresses in metallurgy between the forty and | | | | recycled and reused an infinite number of times, |
| the sixty have extended their development and | | | | making it an important material for the future and |
| their applications. They are still refined and | | | | for a sustainable economy. |
| adapted to the demands of various industries | | | | While abroad, the use of stainless steel in cladding |
| such as oil/petrochemical, mining, energy, nuclear | | | | facades of the buildings is quite common, in Italy |
| and food industries. | | | | the use of stainless steel is more limited. |