P355N Pressure Vessel Steel Plate
High-strength P355N pressure vessel steel plate with superior weldability and impact resistance for boilers and industrial pressure equipment.
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High Yield Strength: Minimum yield strength of 355 MPa ensures excellent load-bearing performance.
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Good Weldability: Low carbon equivalent provides excellent welding performance without preheating.
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Reliable Toughness: Normalized condition enhances grain structure and impact resistance.
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Pressure and Temperature Resistant: Ideal for use in high-temperature and pressure environments.
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Wide Industrial Applications: Used in boilers, chemical vessels, oil storage tanks, and heat exchangers.
P355N Steel Description
P355N is a normalized pressure vessel steel plate specified in the EN 10028-3 standard. It is designed for use in medium to high-temperature pressure systems, providing outstanding mechanical properties and structural reliability.
With a minimum yield strength of 355 MPa, P355N offers high performance under stress and pressure, making it suitable for manufacturing boilers, pressure vessels, storage tanks, and heat exchangers.
The steel exhibits excellent weldability, formability, and impact strength, particularly when supplied in the normalized condition (“N”). It is commonly used across oil and gas, petrochemical, energy, and power generation industries.
P355N Technical Data Sheet
| P355N Chemical Composition | |||||||
| Element | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Al (min, %) | N (max, %) |
| ≤ 0.20 | ≤ 0.50 | 1.10–1.70 | ≤ 0.025 | ≤ 0.015 | ≥ 0.020 | ≤ 0.012 | |
| P355N Mechanical Properties | ||
| Property | Thickness (mm) | Minimum Value |
| Yield Strength (ReH) | ≤16 | 355 MPa |
| Tensile Strength (Rm) | ≤16 | 490–630 MPa |
| Elongation (A5) | — | ≥ 22% |
| Impact Energy (KV, 20°C) | — | ≥ 40 J |
P355N Applications
P355N steel plates are widely applied in pressure vessel and boiler manufacturing, particularly in environments where both high pressure and elevated temperature are required. Typical applications include:
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Boilers and steam drums
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Petrochemical pressure vessels
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Oil and gas storage tanks
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Heat exchangers and power plant equipment
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Refinery and chemical plant structures
P355N’s high yield strength, excellent toughness, and stable welding properties ensure long service life and safety under dynamic operating conditions.
