Looking for reliable P355GH steel plate manufacturers? Gnee Steel, with over 18 years of experience, specializes in supplying premium P355GH boiler steel plates and pressure vessel steel.
P355GH steel plate
Our factory-direct plates offer consistent quality, full mill test certificates, and fast delivery for industrial projects worldwide. P355GH is a low-alloy, fine-grain steel designed for high-pressure boilers, pressure vessels, and hot liquid piping systems.
P355GH is governed by EN 10028-2, providing excellent weldability, high-temperature performance, and strength, making it ideal for boiler drums, heat exchangers, and petrochemical process equipment.
P355GH Steel Plate Technical Specifications
Chemical Composition of P355GH Steel Plate
| Grade | C % | Mn % | S max | N max | Cu max | Nb max | Ti max | Si max | P max | Al max | Cr max | Mo max | Ni max | V max |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P355GH | 0.10–0.22 | 1.10–1.70 | 0.015 | 0.012 | 0.30 | 0.020 | 0.03 | 0.60 | 0.025 | 0.020 | 0.30 | 0.08 | 0.30 | 0.02 |
Mechanical Properties of P355GH Steel Plate
| Thickness (mm) | Yield Strength MPa | Tensile Strength MPa | Elongation % | Impact Energy KVJ (-20°C / 0°C / +20°C) |
|---|---|---|---|---|
| ≤16 | 355 | 510–650 | 20 | 27 / 34 / 40 |
| 16–40 | 345 | 510–650 | 20 | 27 / 34 / 40 |
| 40–60 | 335 | 460–580 | 20 | 27 / 34 / 40 |
| 60–100 | 315 | 490–630 | 20 | 27 / 34 / 40 |
| 100–150 | 295 | 480–630 | 20 | 27 / 34 / 40 |
| 150–250 | 280 | 470–630 | 20 | 27 / 34 / 40 |
Gnee Steel ensures all P355GH plates are normalized, with low non-metallic inclusions and optional HIC resistance for demanding applications.
Applications of P355GH Boiler Steel
Boilers & Boiler Drums
P355GH steel plates are widely used in boiler shells, water walls, superheater tubes, and economizer tubes due to their excellent high-temperature strength and weldability. These components often operate at pressures up to 25–30 bar and temperatures between 250–400°C. The combination of minimum yield strength of 355 MPa (for ≤16 mm thickness) and tensile strength of 510–650 MPa ensures the structural integrity of boilers under cyclic loading.
Heat Exchangers & Steam Generators
For industrial shell-and-tube heat exchangers, process coolers, and waste heat recovery units, P355GH provides high thermal stability and resistance to creep at elevated temperatures. Plate thicknesses from 16 mm up to 150 mm are commonly used, allowing design flexibility for high-capacity heat transfer systems. The elongation of 20% or higher ensures good ductility during fabrication and in-service thermal expansion.
High-Pressure Storage Tanks
P355GH is suitable for petroleum and gas storage tanks or high-pressure fluid containment systems, including LPG and chemical storage. Plates with thicknesses over 100 mm maintain yield strength of 295–280 MPa while ensuring safe operation under pressures of up to 20–25 MPa. BBN Steel supplies plates with low non-metallic inclusion levels, enhancing toughness and fatigue resistance for long-term service.
Application
Chemical & Petrochemical Processing
P355GH is ideal for components such as reactors, distillation columns, fractionators, and high-temperature piping systems in chemical plants. Its good weldability allows complex fabrications with minimal risk of defects. The material can withstand temperatures up to 400°C and shows excellent performance under hydrogen-rich or mildly corrosive environments, which are common in petrochemical processes.
Power Generation Equipment
In nuclear, thermal, and biomass power plants, P355GH plates are used for feedwater heaters, steam generators, condensers, and pressure vessel shells. Its fine-grain structure provides consistent impact strength at temperatures as low as -20°C, ensuring safety during cold startup operations. Plates are available up to 250 mm thickness, providing flexibility for high-capacity energy systems.
P355GH Tubes and Forgings
BBN Steel also offers P355GH seamless tubes, welded pipes, and forged components, enabling complete pressure vessel solutions. Tubes are supplied according to DIN EN 10216-2 for high-temperature pressure service, while forgings meet BS EN 10222-2 standards for elevated temperature applications. Dimensions can be customized, with diameters up to 1420 mm for tubes and thicknesses up to 250 mm for plates.
Why Choose Gnee Steel for P355GH Plates
18+ Years of Expertise: Over 18 years in boiler and pressure vessel steel, supplying thousands of tons annually.
Extensive Stock: Ready stock of P355GH plates in thickness 6–250 mm, width 1000–4050 mm, and lengths 3000–15000 mm, ensuring shipment within 7–10 days for standard sizes.
Strict Quality Control: Each batch is tested with ultrasonic inspection (EN 10160), tensile and impact testing, and comes with EN 10204 3.1/3.2 or ISO 10474 certificates.
Optional Dual Certification: Many plates are dual-certified to EN10028-2 and ASTM A516 standards, offering compatibility for international projects.
HIC-Resistant Options: Plates with low non-metallic inclusion content available for hydrogen-induced cracking (HIC) resistance, essential for petrochemical applications.
Global Shipping & Packaging: Sea freight packaging includes rust-proof wrapping, protective coating, and wooden crating, ensuring safe delivery worldwide.
Full Technical Support: Complete chemical composition sheets, mechanical property reports, and fabrication guidelines are provided, supporting engineering and procurement teams in project planning.
Looking for P355GH boiler steel plates for your project? Contact Gnee Steel today to get the latest price list, full datasheet, and custom support.
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What is P355GH material?
P355GH steel gives optimum performance for pressurised products that must support a creep limit greater than 180N/mm2 at 400ºC. These types of steel are characterised by good weldability. They are used above all for manufacturing boilers, pressure vessels and pipes for the transportation of hot liquids.
What is en 10028 P355GH equivalent to?
P355GH pressure vessel steel is an equivalent to ASTM A516 Grade 70 and ASME SA516 Grade 70.
What is the difference between P355GH and P355NH?
P355GH: This steel is designed for high-temperature applications and is characterized by high strength at temperatures up to 500 °C. P355NH: This steel is designed for low-temperature applications and is characterized by high toughness at low temperatures.
What is P235gh pipe equivalent ASTM material?
P235gh grade is an alloy of European standard EN 10028-2, which is also called the A2885 grade C steel, The P235gh Equivalent Astm Material is the ASTM A285 or the A285M standard.
What is the yield strength of P355GH?
Carbon steels that are characterised by a greater resistance to pressure, capable of bearing significant pressure both at high and low temperatures. The yield strength ranges between 315 and 355 MPa, according to the range of thicknesses and its tensile strength goes from 510 to 650 MPa.