Why 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. With excellent weldability and fine-grain construction, this range of steel plates is trusted by engineers and fabricators globally.
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.
Brown McFarlane’s selection comes with full certification, ensuring compliance with industry requirements and providing confidence in the quality and consistency of every plate we supply.
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Key Features
These steel grades are part of a range of weldable, fine-grain steels designed specifically for high-pressure applications. Below are the defining characteristics of P355NL1 and P355NL2:
Grade Explanation:
- P – Steel for pressure purposes.
- 355 – Minimum yield strength of 355 MPa (16mm thickness and below).
- NL1 – Impact tested at -40°C.
- NL2 – Impact tested at -50°C for superior performance in colder environments.
- Minimum Yield Strength:
- Consistently strong and durable, offering the reliability required for pressure vessel integrity.
- Impact Testing:
- P355NL2 has higher specified impact values compared to P355NL1, particularly suitable for extreme cold environments.
- Tightly Controlled Composition:
- P355NL2 features more regulated phosphorus and sulphur content, offering enhanced mechanical properties and resistance.
- Designed with exceptional weldability, these plates can be readily used in intricate or large-scale projects without compromising structural integrity.
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Understanding the Differences Between P355NL1 and P355NL2 Pressure Vessel Plate
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.
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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.
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Applications
- Boilers
- Calorifiers
- Dished ends
- Heat exchangers
- Pipelines
- Pressure vessels
- Flanges
- Storage tanks
- Valves
- Flanges & fittings
- Condensers
Properties
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 |
Tensile requirements
| Product thickness | Yield strength (min) MPA | Tensile strength MPA | Elongation A% |
|---|---|---|---|
| up to 16mm | 355 | 490 – 630 | 22 min |
| 16mm to 40mm | 345 | 490 – 630 | 22 min |
| over 40mm to 60mm | 335 | 490 – 630 | 22 min |
| over 60mm to 100mm | 315 | 470 – 610 | 21 min |
| over 100mm to 150m | 305 | 460 – 600 | 22 min |
| over 150mm to 250mm | 295 | 450 – 590 | 22 min |
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 |
