What is material grade P265GH?
P265GH is a low-alloy steel defined in European standard (EN 10028-2) and is designed for high-temperature and high-pressure environments. In its name, "P" represents pressure vessel applications, "265" indicates that the minimum yield strength at room temperature is 265 MPa, and "GH" indicates that it is suitable for high temperatures (G is the abbreviation for "high temperature" in German, and H is "heat resistant").
What is the yield strength of P265gh steel?
Tensile strength: 410-530 MPa
Yield strength: ≥265 MPa
Elongation (L₀=5.65√S₀): ≥24%
Impact energy (20℃): ≥40J
What is the temperature range of P265GH material?
P265GH is a European standard grade of pressure vessel steel plate, capable of long-term operating temperatures of 300℃-350℃ and short-term withstand temperatures of 400℃. It maintains stable mechanical properties even at high temperatures, making it suitable for components such as boiler superheaters.
p265gh vs p355gh
| Property | Criteria | P265GH | P355GH | Key Differences |
|---|---|---|---|---|
| Chemical Composition (Typical Values) | Carbon (C) | ≤ 0.20% | ≤ 0.18% | P355GH has slightly lower carbon for improved weldability and toughness. |
| Manganese (Mn) | 0.80–1.40% | 1.00–1.60% | P355GH contains more manganese to enhance strength. | |
| Phosphorus (P) | ≤ 0.025% | ≤ 0.025% | Similar strict limits for both. | |
| Sulfur (S) | ≤ 0.015% (Grade B with controlled S) | ≤ 0.015% | Both have low sulfur for reduced impurities. | |
| Silicon (Si) | ≤ 0.40% | ≤ 0.60% | P355GH allows slightly higher silicon. | |
| Mechanical Properties | Yield Strength (ReH) | ≥ 265 MPa | ≥ 355 MPa | P355GH is significantly stronger, with a higher yield point. |
| Tensile Strength (Rm) | 410–530 MPa | 490–630 MPa | P355GH has a higher tensile strength range. | |
| Elongation (A5) | ≥ 22% (for thickness ≤ 16 mm) | ≥ 20% (for thickness ≤ 16 mm) | P265GH has slightly better ductility; P355GH prioritizes strength. | |
| Impact Toughness | Testing Temperature | Typically 0°C or 20°C (as per standard) | Same as P265GH | Both require good toughness, but P355GH may have stricter requirements due to higher strength. |
| Minimum Impact Energy (KV) | ≥ 27 J (at specified temperature) | ≥ 27 J or higher (depending on thickness) | P355GH may require higher toughness to compensate for its strength. | |
| Heat Treatment | Common Practices | Normalized (N) or normalized rolled | Normalized (N) or quenched and tempered (if required) | P355GH is more likely to undergo additional heat treatment to achieve its higher strength. |
| Applications | Typical Uses | Boilers, pressure vessels, and heat exchangers at moderate temperatures and pressures. | Higher-pressure systems, thick-walled vessels, and applications requiring greater strength at elevated temperatures. | P355GH is used where higher mechanical loads are expected. |
| Weldability | Ease of Welding | Good with proper procedures | Good, but may require preheating or post-weld heat treatment due to higher carbon-equivalent. | P355GH's higher strength may necessitate more careful welding practices. |
P265GH Pipe Factory
