Building with Plates: How EN10025-5 Ensures Quality and Performance

Introduction: EN10025-5 is a European standard that specifies technical delivery conditions for structural steels with improved atmospheric corrosion resistance. This standard is applicable to hot-rolled products in the form of steel plates, wide flats, sections, and bars for use in welded, bolted, or riveted structures exposed to the elements.

 

Here are the main aspects of the EN10025-5 specification, including its subgrades and end uses:

 

Main aspects of EN10025-5:

1. **Scope**: EN10025-5 covers structural steels with improved atmospheric corrosion resistance in the grades S235J0W, S235J2W, S355J0WP, S355J2WP, S355J0W, S355J2W, S355K2W.

2. **Chemical Composition**: The standard specifies the chemical composition requirements for these grades of steel, including elements such as carbon, manganese, phosphorus, sulfur, silicon, copper, chromium, nickel, and molybdenum.

3. **Mechanical Properties**: EN10025-5 defines the mechanical properties such as yield strength, tensile strength, elongation, and impact energy for each grade of steel at different thicknesses.

4. **Atmospheric Corrosion Resistance**: The steel grades covered by EN10025-5 are designed to provide improved resistance to atmospheric corrosion compared to standard structural steels. This is achieved through the addition of alloying elements such as copper, chromium, and phosphorus.

5. **Weldability**: The steels specified in EN10025-5 are designed to be weldable with standard welding methods, providing suitable precautions are taken during welding to avoid detrimental effects on the material properties.

 

Sub-grades of EN10025-5:

1. **S235J0W, S235J2W**: These grades are structural steels with improved atmospheric corrosion resistance. They are suitable for use in welded, bolted, or riveted structures exposed to the elements.

 

2. **S355J0WP, S355J2WP, S355J0W, S355J2W**: These grades offer enhanced atmospheric corrosion resistance compared to S235 grades. They are suitable for applications where resistance to corrosion in outdoor environments is critical, such as bridges, facades, and architectural structures.

 

3. **S355K2W**: This grade provides superior atmospheric corrosion resistance compared to other grades in the EN10025-5 standard. It is suitable for use in highly corrosive environments or applications requiring extended durability, such as coastal structures, marine vessels, and industrial equipment exposed to aggressive atmospheric conditions.

 

End Uses:

The end uses of EN10025-5 compliant steels are primarily in outdoor structures and environments where resistance to atmospheric corrosion is essential. These include:

 

- Bridges and viaducts

- Architectural structures (e.g., building facades, sculptures)

- Outdoor sculptures and artworks

- Industrial buildings and warehouses

- Coastal and marine structures (e.g., piers, docks, seawalls)

- Railway infrastructure

- Transmission towers

 

Additional Information of Suffix Used for Each Sub Grades:

S: Structural steel.

355: Minimum yield strength of 355 MPa.

J0: Indicates that the impact properties of the steel are tested at 0°C.

W: Stands for "Weathering Steel with Improved Atmospheric Corrosion Resistance.

K2: Indicates that the steel has been thermomechanically rolled and has a minimum impact energy value of 40 J at -20°C.

 

Overall, EN10025-5 provides specifications for structural steels with improved atmospheric corrosion resistance, offering durability and longevity in outdoor applications subjected to harsh environmental conditions.

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