EN 10028-2 — Pressure Vessel Steel - High Temperature Performance
Grades
P235GH, P265GH, P295GH, P355GH, 16Mo3, 13CrMo4-5, 10CrMo9-10, 14CrMo4-5
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℃ |
| P295GH | C 0.08-0.20, Mn 0.70-1.40, 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 | Rm 460-580 MPa, Rp0.2 ≥235 (≤16mm) to 225, A≥21%, Akv≥27J at 20℃ |
Application scope
EN 10028-2 specifies steel plates for high-temperature pressure equipment, covering non-alloy steels such as P235GH, 16Mo3 molybdenum steel, and various chromium-molybdenum steel grades. The standard emphasizes high-temperature strength and creep resistance, and is applicable to welded pressure shells, serving the manufacturing of boilers and high-temperature pressure vessels.
Typical applications
Widely used in boiler drums, high-temperature pressure vessels, and petrochemical reactors for pressure-bearing shells and heads, as well as in the manufacture of heat exchanger shells and pressure-bearing components. The non-alloy to chromium-molybdenum series classification facilitates selection based on temperature and pressure, making it suitable for critical pressure-bearing equipment that withstands long-term high-temperature pressure and effectively resists creep deformation. Appropriate grades can be selected according to the medium, temperature, and pressure requirements.
