S275JR - 1.0044

S275JR, also known by the steel number 1.0044, is a non-alloy structural steel that complies with the EN 10025-2 standard, commonly used in engineering and construction industries.

The designation 'S' stands for structural steel, while '275' denotes the minimum yield strength in megapascals, highlighting its ability to withstand heavy loads before deformation occurs.

The 'JR' indicates that the steel has undergone a Charpy V-notch impact test at room temperature (20°C), absorbing at least 27 joules of energy. This impact resistance makes it suitable for structures that may experience variable forces, such as wind, vibrations, or moving loads, ensuring reliability and safety.

S275JR is a low-carbon manganese steel that provides good weldability without the need for preheating or subsequent heat treatment, making it ideal for standard fabrication methods. Its chemical composition includes carbon, manganese, phosphorus, sulfur, and silicon in minimal amounts. Absence of chromium or nickel means it lacks inherent corrosion resistance, requiring additional protective coatings when exposed to harsh environments.

The mechanical properties of S275JR ensure versatility for use in different applications such as bridges, buildings, and general engineering purposes. The material's machinability aligns with that of mild steel, further easing its fabrication into various structural components like beams and columns. In summary, S275JR is a reliable choice for structural projects where moderate strength and impact resistance are needed without the complexities of added alloys or high-strength materials. It stands as a robust, adaptable option for various construction needs, maintaining safety and performance across general structural uses.

Mechanical Properties

Chemical Properties

Applications

S275JR is widely used in a variety of industries due to its strength, durability, and versatility.

In the mechanical and manufacturing sectors, S275JR is used to produce components for machinery and equipment. Its machinability allows it to be easily cut and shaped into parts. This makes it a popular choice for manufacturing plant components, frames, supports, and housings.

The steel is also extensively used in the automotive industry, particularly in the making of car bodies, pipes, and wires. While it might not be suited for high performance or specialized automotive parts that require higher strength or resistance properties, S275JR is well-suited for general-purpose parts that need a balance of strength and cost-effectiveness.

Additionally, S275JR finds applications in mining and heavy machinery construction due to its robust nature and resistance to wear and tear. However, due to its limited corrosion resistance, it may not be suitable for outdoor use without protective coatings or where constant exposure to moisture is a concern.