Looking for high-quality P355NH boiler steel plate? Gnee offers EN10028-3 normalized, weldable fine grain steel plates with strict quality inspection. Widely used in petroleum, chemical, and power station projects, P355NH plates meet the highest standards for pressure vessel applications and high-pressure equipment.
What is P355GH and P355NH Steel Plate?
P355GH steel: A non-alloy steel with specified elevated temperature properties, designed according to EN 10028-2: 2009. Ideal for welded pressure vessels, industrial boilers, and heat exchangers.
P355NH steel: Normalized, weldable fine grain steel under EN 10028-3: 2009, used in petroleum, chemical, power, and boiler industries for reactors, separators, oil & gas tanks, and nuclear reactor shells.
Applications include:
- Pressure vessels and storage tanks
- Boilers and heat exchangers
- Industrial chemical equipment
- Hydropower turbine volutes
Chemical Composition of P355GH vs P355NH
| Grade | C (%) | Mn (%) | S | N | Cu | Nb | Ti | Si | P | Al | Cr | Mo | Ni | V |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P355GH | 0.10-0.22 | 0.10-1.70 | 0.015 | 0.012 | 0.30 | 0.020 | 0.03 | 0.60 | 0.025 | 0.020 | 0.30 | 0.08 | 0.30 | 0.02 |
| P355NH Min | 0.01 | 0.01 | 0.000 | 0.000 | 0.00 | 0.000 | 0.000 | 0.01 | 0.000 | 0.020 | 0.00 | 0.00 | 0.000 | 0.0000 |
| P355NH Max | 0.18 | 0.50 | 0.010 | 0.012 | 0.30 | 0.050 | 0.030 | 0.50 | 0.025 | 0.030 | 0.30 | 0.08 | 0.50 | 0.012 |
Mechanical Properties of P355GH Steel
| Thickness (mm) | Yield Strength MPa | Tensile Strength MPa | Elongation % | Impact KVJ -20° | 0° | +20° |
|---|---|---|---|---|---|---|
| ≤16 | 355 | 510-650 | 20 | 27 | 34 | 40 |
| 16>t≤40 | 345 | 510-650 | 20 | 27 | 34 | 40 |
| 40>t≤60 | 335 | 460-580 | 20 | 27 | 34 | 40 |
| 60>t≤100 | 315 | 490-630 | 20 | 27 | 34 | 40 |
| 100>t≤150 | 295 | 480-630 | 20 | 27 | 34 | 40 |
| 150>t≤250 | 280 | 470-630 | 20 | 27 | 34 | 40 |
Mechanical Properties of P355NH Steel
| Thickness (mm) | Yield Strength MPa | Tensile Strength MPa | Elongation % |
|---|---|---|---|
| ≤16 | 355 | 490-630 | 21 |
| 16>t≤40 | 345 | 490-630 | 21 |
| 40>t≤60 | 335 | 490-630 | 21 |
| 60>t≤100 | 315 | 470-610 | 21 |
| 100>t≤150 | 305 | 460-600 | 21 |
| 150>t≤250 | 295 | 450-590 | 21 |
Advantages of P355GH & P355NH Steel Plates
- Excellent weldability and normalized fine-grain structure
- High strength and toughness at elevated temperatures
- Suitable for high-stress welded constructions
- Widely available ex-stock for fast shipment
- Supports ISO & third-party inspection (SGS/BV/Lloyd's)
Standard Dimensions and Stock Availability
Thickness: 6mm – 250mm
Width: 1500mm – 4050mm
Length: 3000mm – 15000mm
Large stock available for immediate delivery
Factory Photo Example:
P355NH Steel Plates
EN10028 P355GH vs P355NH Application
P355GH: Hot liquid storage, elevated temperature pressure vessels
P355NH: Boilers, reactors, separators, oil & gas tanks, nuclear pressure shells
Both grades comply with EN10028-2/3 standards and are used worldwide
EN10028 P355GH and P355NH steel plates are ideal materials for pressure vessels and industrial boilers. As a trusted EN10028 steel plate manufacturer in China, we provide high-quality plates, tested chemical composition, and mechanical properties.
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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 P355GH equivalent to ASTM material?
P355GH pressure vessel steel is an equivalent to ASTM A516 Grade 70 and ASME SA516 Grade 70.
What is P355NH material?
A pressure vessel steel grade with good weldability and high resistance to brittle cracking, P355NH is used by the world's fabricators for the manufacture of pressure vessel tanks for the storage of pressurised gases.
What is the temperature range of P355NH?
Its most widespread use is in application environments up to 400 ºC. P355NH steel is supplied in the normalised condition. The normalising temperature is 900 - 950 ºC, and it must be left in the furnace after temperature equalising for approximately 1 minute per millimetre of thickness of the plate.