P295GH Boiler Plate

P295GH is a non-alloy quality steel specified under the European standard EN 10028-2. It is designed for use in pressure vessels, boilers, and heat exchangers, particularly for applications requiring specified elevated temperature properties.

Mechanical Properties of EN 10028 – P295GH

Chemical Composition of EN 10028 – P295GH

Core Applications

Pressure Vessel Manufacturing: The primary application field, including storage tanks, heat exchangers, spherical tanks, and liquefied gas tanks. It is widely used in industrial pressure-bearing equipment due to good pressure and temperature resistance.

Petrochemical Industry: Applied to reactors, gas separation towers, distillation units, and oil pipelines. It adapts to corrosive and high-pressure working environments in oil refining and chemical processing.

Power Industry: Used for boiler components, steam turbines, high-pressure water pipes of hydropower stations, and condenser systems. Suitable for thermal and nuclear power plants with long-term high-temperature operation demands.

Nuclear Industry: Manufactures key components such as nuclear reactor pressure vessels and pipelines, relying on stable mechanical properties and safety compliance.

Metallurgical Industry: Applied to high-temperature and high-pressure equipment like furnace bodies and conveying pipelines, enduring harsh working conditions of high temperature and mechanical stress.

Application Conditions

Temperature Condition: Suitable for long-term service at ≤500℃. The minimum impact energy reaches 34J at 0℃, and it maintains good toughness even at -20℃ (impact energy ≥27J).

Pressure Requirement: Matches working pressure corresponding to its mechanical properties. For plates ≤100mm thick, yield strength ≥295MPa and tensile strength 410-530MPa, meeting medium and high pressure demands.

Welding Condition: Low hydrogen welding materials (e.g., E7018) are recommended. Preheating to 100-150℃ is required when plate thickness >30mm; no preheating needed for ≤30mm. Post-welding cooling rate must be controlled to avoid cracks.

Process & Inspection Conditions: Delivered in hot-rolled, normalized or controlled rolling state (normalization preferred for high-pressure equipment). Necessary for non-destructive testing like ultrasonic (UT) and magnetic particle (MT) inspection.

Environment Condition: Adapts to general industrial environments. For H₂S-containing acidic environments, anti-hydrogen-induced cracking tests shall be conducted as agreed.

P295GH Advantages

Excellent High-Temperature Resistance and Stability: It can maintain good mechanical properties and structural stability under long-term service conditions of up to 500℃. There is no obvious attenuation of strength and toughness, which fully meets the working requirements of high-temperature pressure-bearing equipment such as boilers, steam pipelines and reactors in power, petrochemical and other industries.

Outstanding Pressure-Bearing Capacity: With a minimum yield strength of 295MPa and a tensile strength range of 410-530MPa, it has strong load-bearing capacity and deformation resistance. It can safely operate under medium and high pressure working conditions, and is suitable for manufacturing pressure vessels, storage tanks and other core pressure-bearing components that require strict pressure resistance.

Superior Weldability: The steel has low carbon equivalent and good weldability. It can be welded by common welding methods (such as manual arc welding, gas shielded welding) without obvious welding cracks. For thick plates, only appropriate preheating (100-150℃) is needed to ensure the quality of welds, which reduces the difficulty of processing and manufacturing and improves production efficiency.

Good Low-Temperature Toughness: It still maintains excellent toughness in low-temperature environments. The impact energy reaches at least 34J at 0℃, and even at -20℃, the impact energy can be kept above 27J. It avoids brittle fracture risks in low-temperature working scenarios, such as outdoor pressure equipment in cold regions.

Reliable Process Performance: It has good hot working and cold forming performance, and can be processed into various structural parts through hot rolling, normalization, bending, stamping and other processes. The finished products have uniform structure and stable performance, which can meet the diverse processing needs of different industrial equipment.

Cost-Effective and Wide Applicability: Compared with high-alloy pressure vessel steels, P295GH has lower production and use costs while meeting basic pressure and temperature resistance requirements. It is widely applicable to petrochemical, power, metallurgy, nuclear and other industries, and has high economic and practical value.

Strict Quality Control and Safety Compliance: The production process of P295GH is strictly in line with international standards, and it needs to go through strict quality inspection (such as ultrasonic testing, magnetic particle testing) before leaving the factory. It has stable quality and high safety, which can ensure the long-term safe and reliable operation of key equipment.

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What is P295GH?

P295GH is a European standard pressure vessel steel grade specified in EN 10028-2. It is a carbon-manganese steel with good weldability, high-temperature resistance and toughness, widely used in manufacturing pressure vessels and boilers.

Which standard does P295GH comply with?

P295GH complies with the European standard EN 10028-2, which specifies the technical delivery conditions for non-alloy and alloy steels for pressure purposes, including chemical composition, mechanical properties and testing requirements.

What are the main chemical compositions of P295GH?

The main chemical compositions of P295GH are: C ≤ 0.22%, Si ≤ 0.35%, Mn 1.00-1.60%, P ≤ 0.025%, S ≤ 0.015%, and trace elements like Cu, Ni, Cr, Mo to ensure its performance.

What are the mechanical properties of P295GH at room temperature?

At room temperature, P295GH has a yield strength of ≥295 MPa, tensile strength of 460-630 MPa, elongation after fracture of ≥23%, and impact energy (KV) of ≥30 J at 20℃, ensuring good mechanical performance.

What is the maximum service temperature of P295GH?

The maximum continuous service temperature of P295GH is about 450℃. It maintains stable mechanical properties and corrosion resistance within this temperature range, suitable for high-temperature pressure-bearing environments.

What are the common applications of P295GH?

P295GH is widely used in manufacturing pressure vessels, boilers, heat exchangers, steam pipes and other equipment in petroleum, chemical, power generation and other industries due to its excellent pressure and high-temperature resistance.

Is P295GH weldable? What welding methods are suitable?

Yes, P295GH has good weldability. Suitable welding methods include manual arc welding (MMA), gas metal arc welding (GMAW), submerged arc welding (SAW) and tungsten inert gas welding (TIG) without preheating under normal thickness.

Does P295GH require preheating before welding?

Preheating is not required for P295GH when welding thin plates (≤12mm) under normal ambient temperature. For thick plates (>12mm) or low-temperature environments, preheating to 50-100℃ is recommended to prevent cold cracks.

What is the difference between P295GH and P235GH?

The main difference lies in yield strength: P295GH has a yield strength of ≥295 MPa, while P235GH is ≥235 MPa. P295GH also has higher tensile strength, suitable for more demanding pressure-bearing scenarios than P235GH.

Can P295GH be used in low-temperature environments?

P295GH is not a low-temperature steel. Its minimum service temperature is generally -20℃. For lower temperature environments (<-20℃), low-temperature steel grades like P355NL1 should be selected instead to avoid brittle fracture.