Pressure vessel steel P355GH material is a non-alloy steel grade designed for boiler manufacturing and pressure vessel fabrication under the EN 10028-2 standard.
Pressure vessel steel P355GH material
With a minimum yield strength of 355 MPa (for thickness ≤16 mm), this material offers excellent weldability, reliable strength, and stable performance in elevated temperature environments.
As a professional steel supplier, we provide high-quality P355GH steel plates suitable for demanding applications such as boilers, pressure vessels, and pipelines transporting hot liquids.
What is P355GH Material?
P355GH is a pressure vessel steel grade specifically developed for use at elevated temperatures. The designation "P" stands for pressure purposes, while "355" indicates the minimum yield strength of 355 MPa.
This material is typically supplied in the normalized condition, ensuring a refined grain structure and consistent mechanical properties. Due to its balanced chemical composition, P355GH steel provides both strength and good weldability, making it highly suitable for fabrication processes.
Chemical Composition of P355GH Steel
The chemical composition of P355GH material is strictly controlled to ensure performance in high-pressure and high-temperature environments.
| Element | Content (%) |
|---|---|
| C | 0.10 – 0.22 |
| Mn | 1.10 – 1.70 |
| S | ≤ 0.015 |
| N | ≤ 0.012 |
| Cu | ≤ 0.30 |
| Nb | ≤ 0.020 |
| Ti | ≤ 0.03 |
| Si | ≤ 0.60 |
| P | ≤ 0.025 |
| Al | ≥ 0.020 |
| Cr | ≤ 0.30 |
| Mo | ≤ 0.08 |
| Ni | ≤ 0.30 |
| V | ≤ 0.02 |
The low sulfur and phosphorus content improves ductility and reduces the risk of cracking, while alloying elements enhance strength and toughness.
Mechanical Properties of P355GH Steel
P355GH steel offers excellent mechanical performance across different thickness ranges, ensuring reliability in pressure applications.
| Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| ≤16 | ≥355 | 510 – 650 | ≥20 |
| 16–40 | ≥345 | 510 – 650 | ≥20 |
| 40–60 | ≥335 | 460 – 580 | ≥20 |
| 60–100 | ≥315 | 490 – 630 | ≥20 |
| 100–150 | ≥295 | 480 – 630 | ≥20 |
| 150–250 | ≥280 | 470 – 630 | ≥20 |
Impact Toughness
| Temperature | Impact Energy (min) |
|---|---|
| -20°C | 27 J |
| 0°C | 34 J |
| +20°C | 40 J |
These properties ensure that P355GH steel maintains structural integrity under both pressure and temperature variations.
Key Features of P355GH Material
One of the major advantages of P355GH steel is its excellent weldability, which allows for efficient fabrication without compromising performance. In addition, the material provides stable mechanical properties at elevated temperatures, making it suitable for long-term service conditions.
Another important feature is its versatility. P355GH performs reliably across a wide range of thicknesses and operating environments, from moderate to high temperatures.
Applications of P355GH Steel
Due to its strong performance characteristics, P355GH material is widely used in:
- Boilers and pressure vessels
- Heat exchangers
- Pipelines transporting hot liquids
- Petrochemical equipment
- Power plant systems
Its ability to withstand both high pressure and elevated temperatures makes it a preferred choice in critical industrial sectors.
Why Choose P355GH Steel Plate?
Compared with general structural steel, P355GH pressure vessel steel is specifically engineered for safety and durability in high-pressure environments. It offers a better balance of strength, weldability, and temperature resistance, ensuring long service life and reduced maintenance costs.
Pressure vessel steel P355GH material is an ideal solution for boiler and pressure vessel applications requiring reliable performance at elevated temperatures.
Its optimized chemical composition and strong mechanical properties make it a trusted material in industries such as oil & gas, power generation, and petrochemical processing.
As a professional P355GH steel plate supplier, we offer a wide range of sizes, fast delivery, and customized processing services. Contact us today for detailed specifications and a competitive quotation.
Contact now to get P355NH steels Quote
What is P355NH material?
P355NH steel is characterised by good weldability and high resistance to brittle cracking.
What is the difference between p355 and S355 steel?
Mechanical Properties: P355GH: Has a minimum yield strength of 355 MPa and is optimized for high-temperature environments in pressure vessels, but has lower toughness in cold conditions. S355J2: Also has a yield strength of 355 MPa but is optimized for structural applications requiring impact toughness.
What is the difference between S355H and s355nh?
Purpose: Similar to S355H, it is used for structural hollow sections, but the "N" indicates that the steel is normalized or normalized rolled, which improves its toughness and weldability by refining the grain structure.
What is the difference between P355GH and P355NH?
P355GH steel is used worldwide by fabricators of welded pressure vessels, industrial boilers and heat exchangers and is engineered to work well in elevated temperature service. P355NH steel is normalized weldable fine grain steel flats under EN 10028-3: 2009 standard.