S275J2 - 1.0145

S275J2 is a structural steel grade defined by the EN 10025-2 standard. This grade is designed primarily for structural applications and is characterized by a low carbon content, which allows it to be easily welded.

"S" denotes that it's a structural steel, while "275" indicates a minimum yield strength of 275 megapascals. The "J2" implies that the steel provides a specified minimum impact energy of 27 joules at -20°C, making it suitable for colder climates.

S275J2 is known for its high tensile strength and excellent cold-forming properties. It is produced through a fully killed steel process and is supplied in various conditions such as normalized or control rolled, enhancing its application flexibility. This grade can be used in a wide array of industrial applications including construction of bridges, buildings, and in the manufacturing of cranes, trailers, and other machinery.

The mechanical properties of S275J2 make it able to endure dynamic loads without deforming. It boasts decent yield strength and good elongation at break, which contribute to its ductility. This makes S275J2 a reliable choice in situations where resistance to fracture and high impact stresses at low temperatures are critical.

In terms of chemistry, the steel comprises primarily iron, with manganese to improve tensile strength and toughness. It contains copper, which can enhance corrosion resistance to a degree, though it is not specifically designed for high-corrosion environments. The limits on carbon ensure better weldability and processing without compromising the structural integrity. Phosphorus and sulfur are kept at low levels to reduce brittleness and enhance quality.

Overall, S275J2 is an excellent choice for structural projects that require a balance of strength, weldability, and resistance to brittle fracture, especially in adverse temperature conditions.

Mechanical Properties

Chemical Properties

Applications

S275J2 steel is widely used across various industries due to its robust mechanical properties and excellent impact resistance in low-temperature environments.

In the construction sector, S275J2 is a common choice for building infrastructure such as bridges and tunnels. Its ability to withstand environmental stresses and mechanical loads, even in cold climates, makes it invaluable for these large-scale projects. Similarly, the steel is employed in the manufacturing of structural components like beams and support structures in buildings, ensuring long-term durability and stability.

In marine and offshore applications, S275J2's toughness and resistance to harsh environments make it suitable for constructing offshore structures such as oil rigs, platforms, and wind farm foundations. This grade of steel performs well in the maritime environment, offering reliability for offshore installations.

The transport industry benefits from S275J2 for producing freight cars, railway wagons, and trailers, as well as heavy equipment like bulldozers and cranes. Its strength ensures that these vehicles and machines can safely carry heavy loads.

However, S275J2 is not suited for applications requiring high corrosion resistance, unless it is adequately treated with protective coatings. Its limitations become apparent in marine applications without such coatings, where exposure to salt water can accelerate corrosion. Nonetheless, when used with proper surface treatment, it remains a versatile and reliable choice for both onshore and offshore projects.