P265GH pressure vessel steel is one of the most commonly used European and German standard grades, developed to replace older BS1501 and DIN 17155 / DIN 1639 specifications.
P265GH steel is a weldable boiler and pressure vessel grade designed for elevated temperature service. The designation "265" represents the minimum yield strength of 265 MPa in normalized condition, making it suitable for demanding applications in power generation, oil & gas, petrochemical, and chemical industries.
P265GH pressure vessel steel
This grade is available in plate, pipe, and forging forms, providing flexibility for different pressure system designs. Contact us for the latest EN P265GH pressure vessel steel price list and supply options.
P265GH Chemical Composition (EN 10028-2 / EN 10216-2, Heat Analysis)
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.20 |
| Silicon (Si) | ≤ 0.40 |
| Manganese (Mn) | 0.80–1.40 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.010 |
| Aluminum (Al, total) | ≥ 0.020 |
| Nitrogen (N) | ≤ 0.012 |
| Chromium (Cr) | ≤ 0.30 |
| Copper (Cu) | ≤ 0.30 |
| Molybdenum (Mo) | ≤ 0.08 |
| Nickel (Ni) | ≤ 0.30 |
| Niobium (Nb) | ≤ 0.030 |
| Titanium (Ti) | ≤ 0.03 |
| Vanadium (V) | ≤ 0.02 |
| Cr + Cu + Mo + Ni | ≤ 0.70 |
P265GH Mechanical Properties
| Thickness (mm) | Yield Strength ReH (MPa) Min | Tensile Strength Rm (MPa) | Elongation A (%) Min |
|---|---|---|---|
| ≤16 | 265 | 410–530 | 22 |
| >16–40 | 255 | 410–530 | 22 |
| >40–60 | 245 | 410–530 | 22 |
| >60–100 | 215 | 410–530 | 22 |
| >100–150 | 200 | 400–530 | 22 |
| >150–250 | 185 | 390–530 | 22 |
| Test Temperature | Charpy V-notch Impact Energy (Transverse) |
|---|---|
| -20°C | ≥27 J |
| 0°C | ≥34 J |
| +20°C | ≥40 J |
EN P265GH Steel Standard Coverage and Replacement Grades
P265GH is specified under the EN system and has replaced several legacy European standards.
Key standard references include:
- EN 10028 series – flat products for pressure purposes
- Replacement of BS1501 and DIN 17155 / DIN 1639 grades
- Widely accepted across European and international pressure equipment projects
- This makes EN P265GH steel a preferred choice for modernization and retrofit projects.
P265GH Steel Plate for Pressure Vessels and Nuclear Equipment
EN P265GH Pressure Vessel Plate Overview
Pressure vessels are critical components in PWR nuclear power plants, directly affecting operational safety and service life.
P265GH steel plate is a low-alloy pressure vessel steel designed to meet strict performance requirements, including –20°C transverse impact performance and heavy thickness applications.
Applicable Standards for P265GH Plate
P265GH plates are manufactured in accordance with:
DIN EN 10028-1
Flat products made of steels for pressure purposes – general requirements
DIN EN 10028-2
Flat products made of non-alloy and alloy steels with specified elevated temperature properties
EN 10029
Hot-rolled steel plates ≥3 mm – tolerances on dimensions and shape
These standards ensure consistency, safety, and fabrication reliability.
Heat Treatment and Fabrication
P265GH is normally supplied in the normalized (+N) condition, achieved by heating to 890–950°C followed by air cooling. The normalizing treatment refines the grain structure, ensuring the specified tensile properties and impact toughness.
Weldability: Excellent - P265GH is a weldable fine-grain steel. All common arc welding processes (SMAW, GMAW, FCAW, SAW, GTAW) can be used. For matching filler metals, use E42 series electrodes per EN ISO 2560-A.
Preheat: Not generally required for thickness ≤ 30 mm. For 30–100 mm, preheat to 100–150°C is recommended, particularly for restrained joints.
Post-Weld Heat Treatment (PWHT): Required per pressure vessel design code (e.g., EN 13445, ASME BPVC Section VIII). Typical stress relief: 580–620°C for 1 hour per 25 mm thickness, minimum 30 minutes.
Cold and Hot Forming: P265GH can be cold and hot formed. For hot forming, re-normalizing after forming is required to restore mechanical properties.
P265GH Forgings for Pressure System Components
EN P265GH Forged and Machined Parts
P265GH forgings are commonly used as fastening, connecting, or assembling components in pressure systems transporting gas or water.
Typical forged products include:
- Flanges
- Rings
- Shafts
Machined pressure components
These forgings offer high structural integrity and excellent performance under thermal stress.
Forging Standard for P265GH
P265GH forged products comply with:
BS EN 10222-2
Steel forgings for pressure purposes – ferritic and martensitic steels with specified elevated temperature properties
This ensures suitability for critical pressure applications.
Comparison: P235GH vs P265GH vs S355
| Property | P235GH | P265GH | S355J2 |
|---|---|---|---|
| Standard | EN 10028-2 | EN 10028-2 | EN 10025-2 |
| Steel Type | Pressure vessel | Pressure vessel | Structural |
| Yield (t≤16mm) | 235 MPa | 265 MPa | 355 MPa |
| Tensile Strength | 360–480 MPa | 410–530 MPa | 470–630 MPa |
| Charpy @ 0°C | 27 J | 34 J | 27 J |
| Elevated Temp Service | ✓ (GH) | ✓ (GH) | Not rated |
| Creep Properties | Proven | Proven | Not applicable |
Why Choose P265GH Steel for Pressure Equipment
Key advantages of EN P265GH steel include:
- Minimum yield strength of 265 MPa in normalized condition
- Excellent weldability and formability
- Stable performance at elevated temperatures
- Broad standard coverage for plate, pipe, and forgings
- Wide application across energy and process industries
These features make P265GH a versatile and reliable pressure vessel steel.
Industries Using EN P265GH Pressure Vessel Steel
P265GH steel products are widely applied in:
Power generation plants
Oil & gas processing facilities
Petrochemical industries
Chemical processing equipment
Nuclear power systems
Its proven performance ensures long-term operational safety.
With broad standard compatibility and proven elevated-temperature performance, EN P265GH pressure vessel steel remains a trusted solution for boilers, pressure vessels, piping systems, and forged components. Available in plate, pipe, and forging forms, P265GH supports complex pressure system designs across critical industries.
Contact us for the latest EN P265GH pressure vessel steel price list and technical support today.
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Application
What is P265GH steel equivalent to?
P265GH is a European material standard steel grade commonly used in pressure vessel and boiler applications. Its approximate equivalent in ASTM standards is ASTM A516 Grade 60.
What is the tensile strength of P265GH?
Steel for boiler making and pressure vessels with a minimum yield strength of 265 MPa and a tensile strength of 410 to 530 MPa.
What is the difference between P265GH and S355?
P265gh is a pressure vessel grade steel having superior chemical concentration than the S355 grade. The S355 grade is a structural steel module, having superior mechanical properties compared to the P265gh grade.
What is the difference between P235GH and P265GH?
P235GH: Has a minimum yield strength of 235 MPa, making it suitable for moderate-pressure applications. Its tensile strength ranges between 360-480 MPa. P265GH: Offers a higher yield strength of 265 MPa and a tensile strength of 410-530 MPa, providing better performance in higher-pressure environments.
What is the temperature range of P265GH material?
The unalloyed steel is designed for use in continuous operation up to approx. 400 °C and for pipes up to approx. 450 °C wall temperature. Sheets made of P265GH are characterized by good weldability and the steels can be easily cold and hot formed.
What is P265GH material?
P265GH is a weldable pressure vessel and boiler steel grade used by the world's industrial fabricators. The material, which is ideally suited for elevated temperature service, is commonly found in the oil & gas, petrochemical and chemical industry.