Structural Pipes ERW Steel Pipe EN 10219 S355JR

S355JR is a non-alloy structural steel defined in EN 10219, designed for cold-formed welded structural hollow sections. The material typically provides a minimum yield strength of 355 MPa, with tensile strength ranging from approximately 470 to 630 MPa, ensuring strong load-bearing capacity in structural systems. Its chemical composition generally limits carbon to about 0.20 percent while maintaining balanced manganese content around 1.50 percent, which enhances both strength and weldability. The "JR" designation indicates impact testing at room temperature, ensuring adequate toughness for general construction environments.

Huayang Steel Pipe manufactures ERW structural pipes using advanced high-frequency electric resistance welding technology, forming a uniform and continuous longitudinal weld seam. Precision forming and sizing processes ensure accurate outer diameter and consistent wall thickness throughout the pipe length. Each pipe undergoes weld seam ultrasonic inspection, dimensional verification, and mechanical performance testing to meet structural engineering requirements. For construction applications, additional treatments such as galvanizing or anti-corrosion coatings can be applied to improve durability and extend service life in outdoor or humid environments.