P355GH is a high-strength, low-alloy steel grade designed for boilers, pressure vessels, and high-temperature pipelines. This fine-grained, non-alloy steel is widely used in power generation, chemical processing, petrochemical, and oil & gas industries. P355GH combines excellent mechanical strength, weldability, toughness, and elevated temperature performance.
P355GH
The designation "P355GH" indicates:
P: Pressure vessel application
355: Minimum yield strength of 355 MPa (≤16 mm thickness)
G: Fine-grain steel
H: Suitable for elevated temperatures
P355GH Steel Specifications
| Parameter | Details |
|---|---|
| Standard | EN 10028-2: Flat products made of steels for pressure purposes (elevated temperature service) |
| Thickness | 1 mm – 250 mm |
| Width | 1500 mm – 3500 mm |
| Length | 3000 mm – 27,000 mm |
| Heat Treatment | Normalized |
| Third-Party Inspection | ABS, DNV, BV, GL, CCS, LR, RINA, KR, NK, CE, SGS, IKE, IEI or other approved quality departments |
| Equivalent Grades | S355J2 (EN10025-2), ASTM A516 Grade 60/70 |
Products Description
| Element | C | Si | Mn | P | S | Al(min) | N | Cr | Cu | Mo | Nb | Ni | Ti | V |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P355GH | 0.10–0.22 | 0.60 | 1.10–1.70 | 0.025 | 0.015 | 0.020 | 0.012 | 0.30 | 0.30 | 0.08 | 0.040 | 0.30 | 0.03 | 0.02 |
Comparison with S355J2:
| Element | C | Si | Mn | P | S | Cr | Mo | Nb | Ni | V |
|---|---|---|---|---|---|---|---|---|---|---|
| S355J2 | ≤0.24 | 0.60 | ≤1.70 | ≤0.035 | ≤0.035 | - | - | - | - | 0.60 |
P355GH Mechanical Properties
| 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 | 510–650 | 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 |
S355J2 for reference:
| Thickness (mm) | ReH Min (MPa) | Rm (MPa) | A (%) |
|---|---|---|---|
| ≤16 | 355 | 510–680 | 22 |
| 16–40 | 345 | 470–630 | 21 |
| 40–63 | 335 | 450–600 | 20 |
| 63–100 | 325 | 450–600 | 18 |
| 100–150 | 315 | 450–600 | 17 |
| 150–250 | 295 | 450–600 | 17 |
| 250–400 | 285 | 450–600 | - |
Applications of P355GH Steel
P355GH steel is suitable for high-pressure, high-temperature industrial applications, including:
- Boilers & Boiler Drums: Shells, water walls, superheater tubes, economizer tubes.
- Heat Exchangers & Steam Generators: Shell-and-tube exchangers, industrial heaters, waste heat recovery systems.
- High-Pressure Storage Tanks: Petroleum and gas storage, LPG tanks, pressurized fluid containment.
- Chemical & Petrochemical Processing: Reactors, distillation columns, fractionators, high-temperature piping.
- Power Generation Equipment: Nuclear plant pressure components, feedwater heaters, condensers, steam generators.
- Tubes & Forgings: Seamless and welded tubes, forged components, customized dimensions for pressure vessel fabrication.
Application
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.