EN 10216-2 (耐候级) — Weathering steel seamless pipe
Grades
P235GH, P265GH (耐候改性级)
Chemical composition and mechanical properties
| Grade | Chemical composition | Mechanical properties |
|---|---|---|
| P235GH | C≤0.16, Mn 0.40-1.20, Si≤0.35, P≤0.025, S≤0.020, Cr≤0.30, Cu≤0.30, Mo≤0.08, Ni≤0.30, Nb≤0.02, Ti≤0.03, V≤0.02, Al≥0.020, N≤0.012, Cr+Cu+Mo+Ni≤0.70 | Rm 360-480 MPa, Rp0.2 ≥195 (≤16mm) to 185, A≥24%, Akv≥27J at 20℃ (wall thickness≤60mm) |
| P265GH | C≤0.20, Mn 0.50-1.40, Si≤0.40, P≤0.025, S≤0.020, Cr≤0.30, Cu≤0.30, Mo≤0.08, Ni≤0.30, Nb≤0.02, Ti≤0.03, V≤0.02, Al≥0.020, N≤0.012, Cr+Cu+Mo+Ni≤0.70 | Rm 410-530 MPa, Rp0.2 ≥215 (≤16mm) to 205, A≥22%, Akv≥27J at 20℃ |
Application scope
EN 10216-2 specifies seamless steel pipes for pressure applications, using weather-modified grades P235GH and P265GH, suitable for welded outdoor pressure pipelines. The standard specifies composition, mechanical properties, and room-temperature impact toughness, enhancing resistance to atmospheric corrosion in exposed environments and reducing the need for external corrosion protection through weather modification. The products are seamless, reliably pressure-bearing, and suitable for exposed, weather-resistant pipeline applications.
Typical applications
Primarily used in outdoor pressure pipelines and exposed process pipelines, such as sections of steam, hot water, and fluid transport pipelines that are exposed to the atmosphere for extended periods, as well as in bridge pipeline systems and outdoor pipe galleries. Thanks to its pressure-bearing properties and weather-resistant modifications that enhance its resistance to atmospheric corrosion, it is suitable for exposed installation in environments without insulation or external protection, reducing the need for external corrosion protection maintenance and serving power, chemical, and municipal engineering projects.
