Highway Guardrail ERW Steel Pipe API 5L GR.B

API 5L Gr.B carbon steel offers balanced mechanical properties suitable for infrastructure support components such as guardrail posts. The material typically provides a minimum yield strength of approximately 245 MPa and tensile strength ranging from about 415 to 760 MPa. Its chemical composition usually controls carbon around or below 0.28 percent while maintaining manganese levels near 1.20 percent, helping achieve a good combination of strength, toughness, and weldability. These characteristics allow the pipe to absorb impact loads and maintain structural stability in roadside safety systems.

Huayang Steel Pipe manufactures ERW guardrail pipes using advanced high-frequency electric resistance welding technology, which produces a uniform and continuous longitudinal weld seam. Precision forming and sizing equipment ensure accurate outer diameter and consistent wall thickness along the entire pipe length. Each pipe undergoes weld seam ultrasonic inspection, dimensional measurement, and mechanical property verification to ensure stable structural performance. For highway installations, hot-dip galvanizing or other corrosion-resistant coatings are commonly applied to enhance durability and extend service life under outdoor weather exposure.