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Metal Window Frames

Steel frames for historic centers

Choosing natural and precious materials – such as Galvanized Steel, Stainless Steel, Corten Steel or Brass, in the wide range of finishes and processes proposed – leads to finding effective and elegant solutions for every aesthetic and performance requirement: from large size to transparency; from the original design detail, to the desired plastic, material or chromatic effect; from the inclusion in delicate historical-monumental contexts, to the duration in hostile climates.

Iron Window, Bronze Window, Steel Thermal Break Window

Conceived and built to replace the windows and doors used from the nineteenth century to the middle of the last century, they are used in contemporary architecture in search of transparency and purity of lines, dematerializing the walls and allowing great freedom in the design of the window.


Iron-window with thermal break, with profiles from only 27mm to 47mm for the lateral section, 62mm for the central section, depth 65mm. It can house insulating glass up to 40 mm. The profiles of doors and fixed uprights have the same design in the front of the window, both outside and inside. The glasses are coplanar.
OS2 65.2 is part of the family of OS2 profiles, profiles, designed, conceived and manufactured by, Secco Sistemi,
Jensen, Palladio, for the replacement of the windows used from the nineteenth century to the middle of the last century.
Also used in contemporary architecture, for historic centers, in search of transparency and purity of lines, the slender profiles of the OS2 system dematerialize the walls and allow great freedom in the design of the frame.
The performance of the OS2 thermal break system has been tested by the best European certification laboratories according to the reference standards EN 14351-1.

We also paint steel. This painting process is similar to that of aluminum.
The key difference lies in the pretreatment stage. In fact, chromium-based products are used for aluminum, through immersion in the tank, phosphorus-based products are used for steel.
Phosphating makes it possible to alter the characteristics of the steel in order to create phosphates chemically bonded to the substrate which improve resistance to corrosion and facilitate the adhesion of the powder paint on the product.


The corrosion resistance (cor-rosion) of corten is from 6 to 8 times higher than traditional steels and its tensile yield strength (ten-sile) is double, which allows the creation of large and heavy doors and windows, with excellent performance, with very small section profiles.
Special alloys with copper, chromium and phosphorus, corten steels have the property of protecting themselves with a surface patina that prevents the spread of corrosion and takes on colors and shades evocative of the passage of time.
Technological innovation and the ability to interpret the orientations of contemporary architecture have led Secco Sistemi to be the first to introduce corten steel in windows: the elegant and performing profiles, complete with elements and accessories, are also made of corten, brass, copper, stainless steel, with the desired finish and chromatic effect.

Alloys based on iron, carbon, nickel and molybdenum, stainless steels do not rust when exposed to the atmosphere, are extremely durable, resistant to corrosion, require minimal maintenance and very high recyclability, up to 90%.
The physical-mechanical characteristics of stainless steel make it possible to produce profiles with a very small section, reducing the visual impact of the window, to the benefit of the brightness of the interior spaces. The thermal conductivity 10 times lower than aluminum also makes it possible to create thermal break elements with a low transmittance value.
For the production of its profiles, two types of stainless steel are used in particular: 304 with a satin finish, and 316L – suitable for marine environments – with a scotch-brite or glossy finish.

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