S355jowp Corten

S355jowp Corten

Acciaio Corten arrugginito Acciaio Corten arrugginito
Acciaio pre-stagionato Acciaio pre-stagionato

S355JOWP Corten steel is a high-strength weathering structural steel that combines good mechanical properties with atmospheric corrosion resistance. Its alloy composition allows the surface to form a strato protettivo stabile di ruggine, which reduces maintenance and extends service life.

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S355JOWP Corten steel is a type of weathering structural steel defined under the European standard for atmospheric corrosion-resistant steels. This material is designed to develop a protective rust patina quando esposto a condizioni esterne, which reduces the corrosion rate and increases long-term durability.

Because of its strength and corrosion resistance, S355JOWP is widely used in strutture architettoniche, ponti, and outdoor steel constructions.

Mechanical Properties of S355JOWP Steel

S355JOWP belongs to the group of high-strength low-alloy structural steels. The material provides good mechanical strength while maintaining resistance to atmospheric corrosion.

Proprietà Valore tipico
Forza di snervamento ≥ 355 MPa
Resistenza alla trazione 470 – 630 MPa
Allungamento ≥ 20 %
Resistenza all'ambiente Suitable for structural applications

The relatively high yield strength makes S355JOWP suitable for load-bearing structural components and large outdoor structures.

Chemical Composition of S355JOWP

The corrosion resistance of weathering steel comes from its alloy composition. Elements such as copper, cromo, and nickel help form a stable oxide layer on the surface.

Elemento Contenuto tipico (%)
Carbonio (C) ≤ 0.16
Manganese (Mn) ≤ 1.50
Silicio (E) ≤ 0.50
Fosforo (P) ≤ 0.035
Zolfo (S) ≤ 0.035
Rame (Cu) 0.25 – 0.55
Cromo (Cr) 0.40 – 0.80
Nichel (In) ≤ 0.65

These alloying elements help the steel develop a dense protective patina layer when exposed to weather conditions.

Key Characteristics of S355JOWP Weathering Steel

S355JOWP offers several advantages compared with ordinary structural steel:

  • Good atmospheric corrosion resistance

  • Elevata resistenza strutturale

  • Lunga durata in ambienti esterni

  • Reduced need for painting or protective coatings

  • Aspetto caratteristico color ruggine

Once the protective rust layer stabilizes, the corrosion rate becomes significantly lower than that of standard carbon steel.

Common Applications of S355JOWP Steel

Because of its durability and appearance, S355JOWP weathering steel is commonly used in outdoor engineering and architectural projects.

Strutture architettoniche

S355JOWP steel plates are widely used for:

  • Facciate degli edifici

  • Exterior wall cladding panels

  • Decorative architectural elements

Ponti e infrastrutture

Weathering steel is commonly applied in:

  • Bridge girders and structural beams

  • Highway guardrails

  • Outdoor structural supports

Paesaggio e progettazione urbana

S355JOWP steel is also used for outdoor landscaping components such as:

  • Bordura da giardino

  • Griglie per alberi

  • Planters and retaining walls

  • Sculture all'aperto

Applicazioni industriali

The steel is also used in railway equipment, contenitori, and outdoor industrial structures where long-term weather resistance is required.

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