EN 10028-3 P355NL1 Carbon Steel Plate
P355NL1 steel plate is the European standard pressure vessel steel plate, the implementation of the European standard EN10028 production, steel plate steelmaking by converter smelting or electric furnace refining fine grain sedentary steel, P355NL1 has fatigue resistance, but also has a low temperature performance as well as high yield strength and toughness.
P355NL1 steel plate plate number indicates: "P ": indicates that the European standard container plate; "355": indicates that the minimum yield strength of steel plate is 355, unit MPa; "NL1": indicates that the steel plate is a special low-temperature quality grade steel.
EN10028-3 p355NL1 Pressure vessel plate chemical composition
| Element | Content (% by mass) |
|---|---|
| C | 0.18 max. |
| Si | 0.50 max. |
| Mn | 1.10–1.70 |
| P | 0.025 max. |
| S | 0.008 max. |
| Al (total) | 0.020 min. |
| N | 0.012 max. |
| Cr | 0.30 max. |
| Cu | 0.30 max. |
| Mo | 0.08 max. |
| Nb | 0.05 max. |
| Ni | 0.50 max. |
| Ti | 0.03 max. |
| V | 0.10 max. |
| Nb + Ti + V | 0.12 max. |
EN10028-3 P355NL1 pressure vessel steel plate mechanical property
| Thickness(mm) | Yield strength (≥Mpa) | Tensile strength (Mpa) | Elongation in ≥,% |
| T≤16 | 355 | 490-630 | 22 |
| 16 | 345 | ||
| 40 | 335 | ||
| 60 | 315 | 470-610 | 21 |
| 100 | 305 | 460-600 | |
| 150 | 295 | 450-590 |
Charpy V-Notch Impact Energy of P355NL1 Steel Plate (Minimum Values by Test Temperature)
| Test temperature | Transverse (J min.) | Longitudinal (J min.) |
|---|---|---|
| -40°C | 27 | 30 |
| -20°C | 35 | 40 |
| 0°C | 50 | 50 |
| +20°C | 60 | 70 |
EN 10028-3 P355NL1 Low Temperature Carbon Steel Plate Specification
| Item | Range / Service |
|---|---|
| Thickness | 6–300 mm (400+ mm by negotiation) |
| Width | 1,500–4,050 mm |
| Length | 3,000–15,000 mm (approx. 18,500 mm available on request) |
| Certificates | EN 10204 3.1 as standard; 3.2, PED 2014/68/EU and classification society certification on request |
| Processing | Normalizing, ultrasonic testing, cutting to size, beveling |
EN10028-3 P355NL1 Equivalent Grades
| Standard | Grade |
|---|---|
| ASME SA-516 / ASTM A516 | SA516 Gr.70 |
| GB/T 3531 | 16MnDR |
| DIN (historic) | TStE355 |
| BS 1501 (historic) | 224 Gr.490 LT50 |
P355NL1 vs P355NL2 Steel Plate: What Actually Changes
Both grades belong to EN 10028-3:2017 and are delivered normalized (+N). The differences are narrow but decisive:
| Comparison item | P355NL1 | P355NL2 |
|---|---|---|
| Impact test temperature | -40°C | -50°C |
| P max. (cast, %) | 0.025 | 0.020 |
| S max. (cast, %) | 0.008 | 0.005 |
| Typical applications | LPG bullets and spheres, ammonia storage, low-temperature process vessels | Offshore and extreme-cold service, -50°C design temperature |
| Cost and availability | More widely stocked, broader size range | Fewer producers, tighter chemistry premium |
EN10028-3 P355NL1 steel plate production process
Production process: Primary refining → LF refining → VD treatment → continuous casting (die casting) → cleaning, heating → rolling → (stacking) → surface inspection → batching → flaw detection → heat treatment → cutting and sampling → performance inspection → storage.
EN10028-3 P355NL1 pressure vessel steel plate application
Widely used in: separators, ball tanks, oil and gas tanks, liquefied gas tanks, petroleum, nuclear energy reactor pressure shell, boiler ladle, chemical industry, power station, boiler and other industries, for the production of reactors, heat exchangers, hydropower station high-pressure water pipe, turbine worm shells and other equipment and components.
Why Choose us?
- We offer cutting (plasma/flame/laser), leveling, bending, drilling, beveling, sandblasting, and corrosion protection. We can process finished components according to drawings for direct customer assembly upon receipt.
- We have over 20 international high-precision rolling mills, CNC cutting lines, and surface treatment production lines.
- Our exclusive export standard packaging includes: waterproof film + moisture-proof paper + solid wood pallet + corner protectors.
- Controllable delivery time: standard specifications are shipped within 3-7 days; urgent orders can be prioritized and delivered expedited to ensure no delays to client project schedules.
- We maintain a stock of thousands of tons of steel, with same-day shipping for standard specifications. Small trial orders and samples are supported; minimum order quantities are not mandatory.
Looking for reliable P355NL1 low‑temperature pressure vessel steel plates for low‑service‑temperature equipment? GNEE Steel supplies normalized plates complying with EN standards, together with full test reports. Tell us your operating condition and plate dimensions, and we will sort out the right solution for you.
FAQ
What is the difference between P355NL1 and P355NL2?
The impact test temperature: P355NL1 is guaranteed at -40°C, P355NL2 at -50°C. NL2 also tightens phosphorus to 0.020% max. and sulphur to 0.005% max. (versus 0.025% / 0.008%). Choose by design temperature: at or above -40°C, NL1; below, NL2.
What is the ASME/ASTM equivalent of P355NL1?
The closest approximation is ASME SA516 Gr.70 (ASTM A516 Gr.70) - not a direct substitute: plate ordered to SA-516 must have the -40°C impact energy verified separately or specified as a supplementary requirement, and any substitution re-qualified by the design authority.
Can P355NL1 be used for LNG storage?
No. P355NL1's impact performance is verified down to -40°C. LNG at -162°C requires different materials - 9% nickel steel or aluminium alloys - for primary containment.
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