Steel for Boilers and Pressure Vessels P355N

EN10028-3 P355N steel plate is a European standard normalized pressure vessel steel, classified as normalized weldable fine-grained flat steel for pressurized equipment with a yield strength of 355 MPa, delivered in normalized condition. This steel plate falls under the EN 10028-3 standard as a room temperature quality grade, widely used in industries such as petroleum, chemical, power plants, and boilers for manufacturing pressure-bearing equipment including reactors, heat exchangers, and separators.

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Product Description

1.What are the chemical composition of steel for Boilers and Pressure Vesseles EN10028-3 P355N?

P355N Chemical Composition
Grade	The Element Max(%)
Grade	C	Si	Mn	P	S	Al(min)	N
P355N	0.20	0.50	0.9-1.70	0.03	0.025		0.02
	Cr	Cu	Mo	Nb	Ni	Ti	V
	0.30	0.30	0.08	0.005	0.50	0.03	0.10

2.What are the key performance features of EN10028-3 P355N steel?

High Strength

P355N steel plate offers high yield strength and tensile strength, enabling it to withstand heavy loads in pressure vessel and structural applications.

Excellent Weldability

Due to its normalized heat treatment, P355N steel exhibits superior weldability and is compatible with various welding methods.

Superior Low-Temperature Toughness

P355N steel maintains high impact toughness even at low temperatures, making it suitable for cryogenic pressure vessels and Arctic applications.

Fine-Grained Structure

The fine-grained microstructure enhances resistance to brittle fracture, ensuring structural integrity and safety in critical environments.

Good Machinability & Formability

The steel plate is easy to cut, bend, and shape, allowing for the fabrication of complex pressure vessel components and structural parts.

Creep Resistance

P355N demonstrates good creep resistance under high-temperature and high-pressure conditions, ensuring long-term durability in demanding applications.

3.What are the processing properties of EN10028-3 P355N?

Heat Treatment: Normalizing to optimize microstructural uniformity.

Weldability: Low carbon equivalent (CEV ≤ 0.45%), compatible with various welding processes (e.g., SMAW, SAW).

Machinability: Easy to cut, roll, and drill, suitable for forming complex structures.

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