EN 10028-3 Grade P355NH normalized or normalized formed (+N)

EN 10028-3 Grade P355NH is a normalized fine grain steel plate that meets European standards for pressure vessel applications. It belongs to the EN 10028-3 standard and is designed for use in elevated temperature service.

P355NH steel offers good weldability and high mechanical strength, making it suitable for a variety of pressure vessel applications in industries such as oil and gas, chemical, and power generation. This grade of steel exhibits excellent resistance to brittle fracture and has good impact toughness at low temperatures.

According to the EN 10028-3 standard, P355NH has specific requirements for chemical composition and mechanical properties. The chemical composition includes elements such as carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), and other alloying elements. These elements are controlled within specified limits to ensure the desired properties of the steel.

In terms of mechanical properties, P355NH must meet criteria for yield strength, tensile strength, elongation, and impact energy absorption. These properties determine the material's ability to withstand pressure and perform under elevated temperature conditions.

EN 10028-3 Grade P355NH is a normalized fine grain steel specifically developed for elevated temperature pressure vessel applications. It provides good weldability, high mechanical strength, and excellent toughness, making it suitable for various industrial environments where elevated temperatures and pressure are involved.Heat-resistant weldable fine grain steel for application in pressure vessel construction.Max. application temperature: approx 400 °C

EN 10028-3 Grade P355NH can be supplied in two different conditions: normalized or normalized formed (+N).

Normalized: This condition refers to the steel being subjected to a controlled heating and cooling process to achieve uniform properties throughout the material. It involves heating the steel above its critical temperature, holding it at that temperature for a specific time, and then allowing it to cool in still air. Normalizing improves the mechanical properties of the steel, such as strength and toughness.

Normalized formed (+N): This condition indicates that the steel has undergone a forming process after normalization. The forming process could involve shaping, bending, or any other method of altering the steel's shape. After the forming process, the steel is again subjected to normalization to restore its desired properties.

EN 10028-3 Grade P355NH can be supplied either in a normalized condition or in a normalized formed (+N) condition, depending on the specific requirements of the application.