EN 10217-2 (船用级) — Marine high-temperature welded steel pipe
Grades
P235GH, P265GH, 16Mo3, 13CrMo4-5
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℃ |
| 16Mo3 | C 0.12-0.20, Mn 0.40-0.90, Si≤0.35, P≤0.025, S≤0.020, Cr≤0.30, Cu≤0.30, Mo 0.25-0.35, Ni≤0.30, N≤0.012 | Rm 440-590 MPa, Rp0.2 ≥275 (≤16mm) to 265, A≥22%, Akv≥31J at 20℃ |
Application scope
EN 10217-2 is a marine-grade standard for welded steel pipes used in high-temperature pressure equipment on ships and offshore platforms, including grades such as P235GH, P265GH, and molybdenum-chromium alloy steels such as 16Mo3 and 13CrMo4-5. This standard specifies the composition, high-temperature strength, impact resistance, and weld requirements for high-temperature service. It features good high-temperature performance and weldability and is suitable for large-diameter high-temperature pressure pipelines.
Typical applications
Commonly used in high-temperature and pressure-bearing components such as large-diameter steam pipelines, engine room pipelines, and process pipelines on offshore platforms. Non-alloy grades are used for medium-temperature conditions, while molybdenum-chromium alloy grades are used for higher temperatures. With its excellent high-temperature strength, creep resistance, and weld quality, it is suitable for large-diameter, high-temperature, and high-pressure steam and heat medium transport systems in ships and offshore platforms for power and process piping systems.
