EN 10028-3 P275N Steel for Boilers and Pressure Vessels Steel

Our P275N pressure vessel steel plate/sheet is a high-quality pressure vessel boiler steel plate P275N Material, specifically designed for boilers, pressure vessels, and high-temperature fluid pipelines.

P275N pressure vessel steel plate/sheet

As a professional P275N Steel Supplier, we provide a wide range of sizes, stable quality, and fast global delivery.

We offer flexible size options for different industrial applications:

Custom sizes and cut-to-length services are available based on your project requirements.

The chemical composition of P275N pressure vessels steel ensures a good balance of strength, toughness, and weldability:

This ensures that P275N Material maintains good toughness and structural stability during use.

EN 10028-3 P275N steel plate/sheet is widely used in industries requiring stable strength, pressure resistance, and good weldability. As a typical P275N pressure vessels steel, it performs reliably under medium pressure and moderate temperature conditions.

Boiler Manufacturing (Core Application)

In boiler systems, P275N Material is one of the most commonly used steels due to its balanced mechanical properties.

Typical components include:

• Boiler shells (thickness commonly 10–80 mm)
• Steam drums and water drums (20–120 mm)
• End plates and furnace walls
• Hot water and steam pipelines

Performance Advantages in Boilers:

• Yield strength ≥275 MPa ensures structural stability under internal pressure
• Tensile strength 390–510 MPa provides safety margin for cyclic loading
• Suitable working temperature range: up to ~400°C
• Excellent weldability reduces cracking risk in thick plate welding
• Good formability for rolling into cylindrical boiler shells

Widely used in industrial boilers, power plant boilers, and heating systems.

Pressure Vessels & Storage Tanks

P275N pressure vessels steel is extensively applied in the fabrication of pressure vessels and storage tanks across multiple industries.

Typical applications:

• LPG storage tanks (propane, butane)
• Oil and fuel storage tanks
• Chemical process vessels
• Air receivers and gas cylinders
• Medium-pressure reactors

Typical Design Data:

• Plate thickness range: 6–100 mm (depending on pressure design)
• Design pressure: usually up to 5–10 MPa (depending on vessel design)
• Operating temperature: -20°C to 350°C

Key Benefits:

• Good toughness ensures safety under pressure fluctuations
• Excellent weldability supports longitudinal and circumferential welding
• High-dimensional stability during forming and rolling
• Reliable performance for long-term static pressure loading

Heat Exchangers & Thermal Equipment

P275N Material is also widely used in heat transfer equipment:

• Heat exchanger shells
• Condensers
• Thermal oil systems
• Cooling and heating units

Why P275N is Suitable:

• Good thermal stability under continuous operation
• Resistance to moderate temperature cycling
• Easy fabrication into complex shapes

Oil, Gas & Petrochemical Industry

In the petrochemical sector, P275N pressure vessels steel is used for:

• Storage tanks for crude oil and refined products
• Process vessels in refineries
• Pipeline pressure components
• Separation and reaction equipment

Typical Requirements Met:

• Stable performance under fluctuating pressure
• Good weld integrity for large-scale structures
• Compatibility with coating and anti-corrosion systems

Structural & Engineering Applications

Although mainly designed for pressure equipment, P275N Material can also be used in structural applications:

• Industrial building structures
• Bridge auxiliary components
• Heavy machinery bases

Advantages in Structural Use:

• Higher strength than standard carbon steel
• Better fatigue resistance
• Improved safety margin for load-bearing components

As an experienced P275N Steel Supplier, we offer:

With its optimized composition, reliable mechanical properties, and wide application range, EN 10028-3 P275N steel plate/sheet is a trusted material for boiler and pressure vessel manufacturing.

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f you are looking for a reliable P275N pressure vessels steel plate/sheet, choosing the right supplier is key to ensuring quality and delivery.

We provide high-quality P275N Material, competitive pricing, and fast shipment to support your project.

Contact us today to get the latest price, stock sizes, and technical support for your P275N steel requirements.

Contact now to get P275N steels Quote

What are the core differences between P275N, P275NH, P275NL1, and P275NL2?

The core differences lie in impact test temperature and applicable working conditions. All four grades have a minimum yield strength of ≥275MPa (for thickness ≤16mm) and comply with the EN 10028-3 standard:

P275N: Impact test at -20°C, suitable for normal-temperature pressure vessels and general industrial pipelines;

P275NH: Impact test at -20°C, optimized for high-temperature performance, adaptable to medium-to-high temperature pressure equipment below 350°C;

P275NL1: Impact test at -40°C, suitable for low-temperature storage tanks and separators in cold regions;

P275NL2: Impact test at -50°C, offering the best ultra-low temperature toughness, adaptable to cryogenic equipment such as liquid nitrogen/LNG systems.

What are the corresponding numerical designations for these four grades?

P275N: 1.0483;

P275NH: 1.0485;

P275NL1: 1.0488;

P275NL2: 1.1104.

Does thickness affect performance?

Yes, it does. When the thickness exceeds 16mm, the yield strength gradually decreases (e.g., ≥245MPa for 63~100mm), and the low-temperature toughness also slightly declines. For ultra-low temperature working conditions with thickness ＞40mm, it is recommended to prioritize P275NL2 and increase the sampling ratio for impact tests.

What are the key mechanical property indicators of the four grades?

Yield Strength (ReH): ≥275MPa for thickness ≤16mm, slightly decreasing with increasing thickness (e.g., ≥255MPa for 40~63mm);

Tensile Strength (Rm): 410~560MPa;

Impact Energy (KV): ≥27J for each corresponding impact temperature (regular supply meets ≥40J to enhance safety redundancy);

Elongation (A): ≥22%~24% (adjusted with thickness).

What is the range of available dimensions?

Thickness: 6mm~300mm;

Width: 1500mm~4800mm;

Length: 6000mm~18000mm;

Customized cutting, drilling, and beveling services are available, with a minimum cutting size of 500×500mm.

How is the weldability, and what are the welding recommendations?

It has excellent weldability (CEV ≤0.43%), with recommended solutions:

Welding Consumables: E5515-C1 for manual arc welding, H08MnA+F55A4 flux for submerged arc welding, and ER50-6 for gas metal arc welding;

Preheating Requirement: No preheating required for thickness ≤30mm; preheat to 100~150°C for thickness ＞30mm;

Interpass Temperature: ≤250°C, with heat input controlled at 15~35kJ/cm;

Post-Weld Heat Treatment (PWHT): Recommended for thick plates (＞50mm) – stress relief annealing at 580~620°C for 2 hours.

Can the P275 series be substituted for ASTM A516 Gr70 (American standard) or Q345R (Chinese standard)?

vs. ASTM A516 Gr70: Similar strength, but the P275 series offers better low-temperature toughness . The P275 series is preferred for European projects, while ASTM A516 Gr70 is suitable for North American projects;

vs. Q345R (GB 713): Q345R has higher yield strength (≥345MPa), but the P275 series excels in low-temperature performance (-20°C impact) and high-temperature stability. For international projects, it is recommended to select according to the EN standard first.

What are the differences between P275NL1/NL2 and 16MnDR (Chinese standard)?

16MnDR (GB 3531): Impact test at -40°C, yield strength ≥315MPa, suitable for domestic low-temperature projects;

P275NL1: Impact test at -40°C, yield strength ≥275MPa, belonging to the European standard system with higher international recognition;

P275NL2: Impact test at -50°C, offering better low-temperature toughness than 16MnDR, adaptable to more severe cryogenic working conditions.