Products Description
When pressure vessels are exposed to extremely cold environments, material toughness becomes a critical safety factor. Two commonly discussed grades are P275N and P275NL2 steel plates. Although they belong to the same EN 10028-3 family, their performance at low temperatures differs significantly.
What Is EN10028 P275N steel plate sheet?
P275N steel plate is a hot rolled pressure vessel steel grade specified under EN 10028-3, widely used in the fabrication of pressure-bearing equipment. The designation "P" indicates suitability for pressure purposes, while "275" represents a minimum yield strength of 275 MPa. The suffix "N" means the steel is supplied in a normalized condition, ensuring stable mechanical properties and uniform microstructure.
What Is EN10028 P275NL2 steel plate sheet?
EN10028 P275NL2 steel plate sheet,EN10028 P275NL2 steel plate/sheet, under EN 10028 standard, we can regard P275NL2 steel plate/sheet for boilers and Pressure Vessels steels.EN10028 P275NL2 steel plate/sheet is for boilers and Pressure Vessels steels,it is a normalized steel plate and sheet which is mainly used for building pressure vessels and boilers and pipes for hot liquid.And the followings are the chemical composition and mechanical properties of P275NL2.
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Mechanical Strength: Similar but Not Identical in Performance
Both P275N and P275NL2 share:
- Minimum yield strength of 275 MPa
- Tensile strength range of 410–560 MPa
- Normalized delivery condition
However, strength alone does not define low-temperature safety.
Impact Toughness Comparison
| Grade | Impact Test Temperature | Toughness Level |
|---|---|---|
| P275N | Standard | Normal |
| P275NL2 | ≥ 27 J at –50°C | Very high |
P275NL2 is engineered to resist brittle fracture in extreme cold climates, far beyond the capability of standard P275N steel plate.
Practical Application Differences
- P275N steel plate
Suitable for pressure vessels operating in normal or controlled temperature environments.
- P275NL2 steel plate
Used for offshore platforms, arctic installations, LNG-related infrastructure, and other critical cold-service applications.
Safety vs Cost Consideration
While P275NL2 offers superior low-temperature performance, it also involves higher production and testing costs. Using P275NL2 where it is not required may lead to unnecessary material expenses.
For low-temperature applications, P275NL2 clearly outperforms P275N in terms of toughness and safety. However, for standard environments, P275N remains the more economical and practical choice.
GNEE STEEL provides P275N and P275NL2 steel plates with full inspection documentation to meet different environmental requirements.
👉 Send an inquiry to discuss the right grade for your project.
FAQ:
What is the difference between P275N and P275NH?
P275NH is designed for elevated temperature applications, while P275N is for normal temperatures.
How does P275N compare with P275NL1/NL2?
NL grades offer better low-temperature impact toughness than P275N.
What standards does P275N comply with?
EN 10028-3 European standard for pressure vessel steels.
What thickness range is available for P275N plates?
Commonly from 6 mm up to 200 mm, depending on production capability.
Can P275N be used for pressure equipment certification?
Yes, it is widely accepted for PED-certified pressure equipment.
