EN 10025-5 S235J0W is an economical weathering structural steel with moderate strength(yield strength ≥ 235 MPa, tensile strength typically 360 - 510 MPa), offering excellent corrosion resistance in suitable atmospheric environments, low maintenance costs, and unique industrial aesthetic value. It is a popular material choice in modern architectural and structural design that combines both functionality and aesthetics.

Key Features and Advantages

1. Excellent atmospheric corrosion resistance: Protects the underlying steel by forming a dense and stable oxide layer (rust layer), with corrosion resistance 4-6 times higher than that of ordinary carbon steel, depending on the specific environment (rural, urban, industrial, or coastal areas).

2. Good weldability: Low carbon content ensures excellent weldability, allowing the use of various welding methods (arc welding, gas shielded welding, etc.).

3. Good machinability: Exhibits favorable cold-forming properties (such as cutting, bending, drilling, etc.).

4. Superior mechanical properties: Offers adequate strength and toughness to meet the requirements for general structural components.

5. Paint-free or simplified painting: In many architectural and exposed structures, the material can be intentionally allowed to develop a stable rust layer (known as "Patina") as both the final appearance and a protective layer, significantly reducing long-term maintenance costs.

6. Unique aesthetic effect: The uniform and stable rust-colored oxide layer formed on the surface is widely used in architectural decoration.

Carbon Equivalent of S235J0W Weathering Steel Plate (Corten Steel Plate)

Carbon Equivalent: CEV ≤ 0.44%

Calculate using the International Institute of Welding (IIW) formula: CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15

S235J0W Weathering Steel Plate (Corten Steel Plate) is primarily used for structural components that are exposed to atmospheric environments for extended periods, thanks to its coating-free nature, low maintenance requirements, and unique aesthetics. Applications include:

1. Building Structures: Beam-column systems, facades, curtain wall supports, roof structures, and decorative elements in high-rise buildings, factories, stadiums, etc.

2. Bridge Engineering: Components such as bridge beams and slabs, arch ribs, piers, as well as pedestrian bridges, landscape bridges, and sound barrier supports for highways.

3. Tower Structures: Transmission towers, communication towers, radio and television towers, lighting lighthouses, etc.

4. Outdoor Facilities: Railings, billboards, sculptures, containers, etc.

5. Mechanical Manufacturing: Various mechanical structural parts designed for long-term use outdoors or in harsh environments.

6. Containers and Transport Equipment: Structural components requiring certain weather resistance.

7. Sculptures and Art Installations: Utilizing the naturally weathered patina and texture of the steel.

Usage Precautions

1. Initial rusting stage: Before a stable protective layer forms (approximately 1-3 years), rust runoff may occur, contaminating surrounding surfaces (such as concrete, stone). Drainage design or temporary diversion measures should be considered during planning.

2. Limited applicability in specific environments: In continuously damp, long-term submerged, high salt spray (e.g., coastal splash zones), or severely industrially polluted (high sulfur, high chloride ion) environments, its advantages may diminish, and additional protection may still be required.

3. Welding materials: Specially matched weathering steel electrodes should be used during welding to ensure the weld seam has corrosion resistance similar to that of the base metal.

4. Contact with Other Materials: Direct contact with less active metals, such as stainless steel or copper, should be avoided to prevent galvanic corrosion. Additionally, prolonged contact with ordinary carbon steel should be avoided, as corrosion products from carbon steel may contaminate and affect the protective rust layer.

5. Surface treatment: To accelerate the formation of a stable rust layer and control color, "rust stabilizers" or "rust-inducing treatments" may be applied.

Key Differences Between Similar Grades

International Standard Equivalence

* Since the requirements for chemical composition, mechanical properties, and corrosion resistance mechanisms vary slightly across different standards, "equivalence" typically refers to similarities in intended use and performance rather than exact identity.