The Mechanical Properties Of Weathering Steels

The Mechanical Properties Of Weathering Steels

The mechanical properties of weathering steels Corten steel, thanks to the process of maturation/oxidation that characterizes it, is considered a "live" material, which may vary over time, in shades and hues, depending on the shape of the object, the position in which it is installed...
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The mechanical properties of weathering steels

Corten steel, thanks to the process of maturation/oxidation that characterizes it, is considered a "live" material, which may vary over time, in shades and hues, depending on the shape of the object, the position in which it is installed and according to the cycles of weathering which the object undergoes.

Weathering steel, best-known under the trademark COR-TEN steel and sometimes written without the hyphen as "Corten steel", is a group of steel alloys which were developed to eliminate the need for painting, and form a stable rustlike appearance if exposed to the weather for several years

"Weathering" means that due to their chemical compositions, these steels exhibit increased resistance to atmospheric corrosion compared to other steels. This is because the steel forms a protective layer on its surface under the influence of the weather. The corrosion-retarding effect of the protective layer is produced by the particular distribution and concentration of alloying elements in it. The layer protecting the surface develops and regenerates continuously when subjected to the influence of the weather. In other words, the steel is allowed to rust in order to form the 'protective' coating

The original A 242 alloy has a yield strength of 50,000 pounds per square inch(340,000 kPa) and ultimate tensile strength of 70,000 psi (480,000 kPa) for light-medium rolled shapes and plates up to 0.75 inches (19 mm) thick. It has yield strength of 46,000 psi (320,000 kPa) and ultimate strength of 67,000 psi (460,000 kPa) for medium weight rolled shapes and plates from 0.75–1 inch (19–25 mm) thick. The thickest rolled sections and plates – from 1.5–4 in (38–102 mm) thick have yield strength of 42,000 psi (290,000 kPa) and ultimate strength of 63,000 psi (430,000 kPa).


The mechanical properties of weathering steels


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