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P355N normalized structural steel plate
P355N steel is a normalized, weldable fine-grain steel designed for pressure vessel and high-stress structural applications. It offers excellent yield strength, tensile strength, toughness, and processability, making it ideal for industrial boilers, pressure vessels, and heat exchangers.
The EN 10028-3 standard also includes other grades such as P275 and P460, categorized by minimum yield strength and impact test temperature: NH (0°C and above), NL1 (-20°C and above), NL2 (-40°C and above).
Chemical Composition (%) of P355N Normalized Structural Steel Plate
| Element | Max % |
|---|---|
| C | 0.20 |
| Si | 0.50 |
| Mn | 0.90 – 1.70 |
| P | 0.03 |
| S | 0.025 |
| Al (min) | 0.02 |
| N | 0.02 |
| Cr | 0.30 |
| Cu | 0.30 |
| Mo | 0.08 |
| Nb | 0.005 |
| Ni | 0.50 |
| Ti | 0.03 |
| V | 0.10 |
Carbon Equivalent: Ceq = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15
Mechanical Properties of P355N Normalized Structural Steel Plate
| Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Impact Energy KVJ (min) |
|---|---|---|---|---|
| ≤16 | 355 | 490–630 | 22 | -20°C: 40, 0°C: 47, +20°C: 55 |
| 16–35 | 355 | 490–630 | 22 | -20°C: 40, 0°C: 47, +20°C: 55 |
| 35–50 | 345 | 490–630 | 22 | -20°C: 40, 0°C: 47, +20°C: 55 |
| 50–70 | 325 | 490–630 | 22 | -20°C: 40, 0°C: 47, +20°C: 55 |
| 70–100 | 315 | 470–610 | 21 | -20°C: 40, 0°C: 47, +20°C: 55 |
| 100–150 | 295 | 450–590 | 21 | -20°C: 40, 0°C: 47, +20°C: 55 |
Typical Dimensions of P355N Normalized Structural Steel Plate
| Thickness | Width | Length |
|---|---|---|
| 6 – 350 mm | 1500 – 4200 mm | 3000 – 18000 mm |
Equivalent Grades of P355N of P355N Normalized Structural Steel Plate
| Region | Equivalent Grade |
|---|---|
| Europe / EN | Fe E355 |
| Belgium | D52-1,2 |
| Germany / DIN | A St52 |
| France | A52CP |
| Italy | Fe510-1-KW |
| Sweden | SS 21,06,01 |
| Japan | SPV 355 |
Applications of P355N Normalized Structural Steel Plate
- Boilers and pressure vessels
- Heat exchangers and reactors
- Industrial storage tanks
- Temperature-controlled vessels
- Low-pressure vessels and pipelines
P355N steel is widely used in high-pressure, high-temperature environments across chemical, oil, and power industries.
Certification & Delivery of P355N Normalized Structural Steel Plate
Mill Test Reports: Available as per EN 10204 3.1
Packing: Break bulk or on pallets
Delivery Time: 7–30 days
For high-quality DIN EN 10028-3 P355N normalized structural steel plates, Gnee Steel is your reliable manufacturer and supplier. We offer tested P355N steel plates, fast delivery, and professional service. Contact us today for inquiries and quotations.
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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.