How to Choose EN 10028:3 P355NL1 and P355NL2 Pressure Vessel Steel?

EN 10028:3 is one of the most recognised specifications for pressure vessel steel in Europe, second only to the American ASME/ASTM SA/A516 standard. Whether your equipment is destined for use in frigid temperatures or high-pressure applications, EN 10028:3 P355NL1 and P355NL2 are designed to perform under extreme conditions.

While both grades share many commonalities, it is their specific properties that set them apart:

Impact Testing:

P355NL1 is tested at -40°C, making it suitable for routine cold environments.
P355NL2 offers superior resilience, having passed transverse impact tests at -50°C, ideal for extremely low-temperature operations.
Chemical Composition:
P355NL2 features tighter control over phosphorus and sulphur content, contributing to its improved strength and impact resistance.

Differing Applications

Use P355NL1 for standard pressure vessels in moderate environments.
Opt for P355NL2 in industries requiring enhanced toughness and performance at very low temperatures.

These distinctions ensure that each grade meets the specific demands of your project, allowing you to select the optimal solution for your operational requirements.

If you’re looking to source high-quality pressure vessel plates, Brown McFarlane’s range of EN 10028:3 P355NL1 and P355NL2 steel plates is your ideal choice. Experience superior durability, expert curation and the reliability you can trust, all backed by our commitment to exceptional customer service.

P355NL1 and P355NL2 Steel Plate Chemical Analysis

(cast analysis, % by mass, maximum permitted unless indicated otherwise)

Grade	C	Si	Mn	P	S	Al total	N	Cr	Cu	Mo	Nb	Ni	Ti	V	Nb+Ti+V
P355NL1	0.18	0.50	1.10 – 1.70	0.025	0.008	0.020 min	0.012	0.3	0.3	0.08	0.05	0.50	0.03	0.10	0.12
P355NL2	0.18	0.50	1.10 – 1.70	0.020	0.005	0.020 min	0.012	0.30	0.30	0.08	0.05	0.50	0.03	0.10	0.12

P355NL1 and P355NL2 Steel Plate Impact values

Steel grade	Direction	-50°C	-40°C	-20°C	0°C	+20°C
P355NL1	Tranverse	–	27 J min	35 J min	50 J min	60 J min
P355NL2	Transverse	27 J min	30 J min	40 J min	60 J min	70 J min
P355NL1	Lonigitudinal	30 J min	40 J min	50 J min	70 J min	80 J min
P355NL2	Lonigitudinal	42 J min	45 J min	55 J min	75 J min	85 J min

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Differences Between P355NL1 and P355NL2 Pressure Vessel Plate

Impact Testing:

Differing Applications

P355NL1 and P355NL2 Steel Plate Chemical Analysis

P355NL1 and P355NL2 Steel Plate Impact values