What is S355J2 carbon steel?
S355J2 is a low-carbon, high-strength structural steel conforming to European standard EN 10025-2.
What is the difference between S355J2 and S355J0?
Both S355J2 and S355J0 are structural steel grades conforming to EN 10025-2, but their main difference lies in their impact testing requirements, which affect their performance under different temperature conditions.
S355J0 is suitable for applications with temperatures not lower than 0°C, making it ideal for mild climates. S355J2 is designed for cold environments, maintaining excellent toughness even at temperatures as low as -20°C.
What welding methods are mainly used in the production of S355J2 welded round steel pipes?
The main welding methods for S355J2 welded round steel pipes are high-frequency induction welding and submerged arc welding (SAW). The choice of these methods typically depends on the diameter of the steel pipe; small-diameter pipes use high-frequency induction welding, while large-diameter pipes use submerged arc welding.
What are the main applications of S355J2 welded round steel pipes?
S355J2 steel possesses excellent mechanical properties, thus it is widely used in the manufacture of metal structures and products in the construction and machinery manufacturing sectors. It is applied in industrial and civil engineering, as well as the construction of oil and gas platforms, other offshore structures, transmission towers, and other metal structures. S355J2 steel is also widely used in the manufacture of components for heavy-duty ground and underground equipment (bulldozers, excavators, and dump trucks), railway freight cars, and agricultural machinery.
What is the low-temperature toughness of S355J2 welded round steel pipes?
The low-temperature toughness of S355J2 welded round steel pipes is guaranteed by a Charpy V-notch impact energy of at least 27 Joules at -20°C. This makes this steel suitable for cold-climate engineering and applications requiring the maintenance of strength and ductility at low temperatures.
