HFW Steel Pipe DN450 EN10210 S355JRH For Bridge & Building Structural Applications

S355JRH is a structural hollow section steel grade defined in EN 10210, offering a minimum yield strength of approximately 355 MPa and tensile strength typically ranging from 470 to 630 MPa. The chemical composition is controlled with carbon generally below 0.20 percent and manganese around 1.50 percent, ensuring a good balance between strength and weldability. The material is suitable for applications where resistance to bending, compression, and fatigue is required, especially in bridge and large-span building structures.

Huayang Steel Pipe manufactures DN450 HFW pipes using advanced high-frequency welding technology, ensuring a continuous and uniform longitudinal weld seam with stable metallurgical bonding. Precision forming and sizing processes guarantee accurate outer diameter and consistent wall thickness. Each pipe undergoes weld seam ultrasonic inspection, dimensional verification, and mechanical testing to meet structural standards. For bridge and building applications, additional surface treatments such as galvanizing or anti-corrosion coatings are commonly applied to enhance durability and ensure long-term structural integrity.