P275N Steel Plate
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.
Thanks to its balanced strength, toughness, and weldability, P275N steel plate has become one of the most commonly selected materials for standard pressure vessel applications worldwide.
Why P275N Is Widely Used in Pressure Vessels
Pressure vessels must safely withstand internal pressure, mechanical stress, and long-term service conditions. P275N steel plate meets these requirements through:
- Reliable yield and tensile strength
- Good toughness at normal operating temperatures
- Excellent weldability for fabrication
- Compliance with EN pressure vessel standards
The normalized condition improves grain refinement and reduces internal stress, which is critical for pressure equipment safety.
Typical Pressure Vessel Applications of P275N
P275N steel plate is commonly used for:
- Industrial pressure vessels
- Storage tanks under pressure
- Heat exchangers
- Process vessels in chemical plants
- General boiler components
For applications operating at normal temperature ranges, P275N provides an optimal balance between performance and cost.
Basic Mechanical Properties of P275N Steel Plate
| Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) |
|---|---|---|
| ≤ 16 | ≥ 275 | 410 – 560 |
| 16 – 40 | ≥ 265 | 410 – 560 |
| 40 – 60 | ≥ 255 | 410 – 560 |
These properties make P275N suitable for both thin and medium-thickness pressure vessel components.
|
P275N Chemical Composition |
|||||||
|
Grade |
The Element Max (%) |
||||||
|
C |
Si |
Mn |
P |
S |
Al(min) |
N |
|
|
P275N |
0.18 |
0.40 |
0.5-1.40 |
0.030 |
0.025 |
|
0.02 |
|
Cr |
Cu |
Mo |
Nb |
Ni |
Ti |
V |
|
|
0.30 |
0.30 |
0.08 |
0.005 |
0.50 |
0.03 |
0.05 |
|
Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
P275N Compared with Other P275 Grades
While P275NH is designed for elevated temperature service and P275NL1 / P275NL2 for low-temperature environments, P275N remains the standard choice for most pressure vessel projects where extreme temperature resistance is not required.
P275N steel plate is a proven, reliable material for pressure vessel applications under EN standards. Its mechanical stability, fabrication flexibility, and wide availability make it a preferred option for engineers and buyers alike.
GNEE STEEL supplies P275N steel plates in various thicknesses and specifications, with strict quality control and stable export packaging. For pressure vessel projects requiring consistent quality and competitive supply, P275N from GNEE STEEL is a dependable choice.
👉 Contact us to receive technical details or a quotation.
