The tensile strength of P275N pressure vessel steel sheet

The tensile strength of P275N pressure vessel steel sheet is a key mechanical property that determines its ability to withstand external forces without failure.

P275N pressure vessel steel sheet

As a widely used P275N Material under the EN 10028-3, it offers a balanced combination of strength, ductility, and weldability for pressure equipment applications.

According to EN 10028-3, the tensile strength of P275N pressure vessel steel sheet is:

This tensile strength range ensures that P275N Material can handle moderate stress conditions while maintaining structural integrity.

Tensile strength refers to the maximum stress a material can withstand before breaking. For P275N pressure vessel steel, this means:

• It can resist deformation under internal pressure
• It provides a safety margin beyond the yield point
• It ensures reliability during operation

The combination of ≥275 MPa yield strength and 390–510 MPa tensile strength makes it suitable for pressure-bearing structures.

In applications such as boilers and storage tanks, tensile strength plays a critical role:

• Pressure Resistance

Higher tensile strength allows the steel sheet to withstand internal pressure from gases or liquids.

• Structural Safety

Prevents sudden failure under load, ensuring safe long-term operation.

• Fabrication Performance

Balanced tensile strength ensures that P275N Material remains easy to form, bend, and weld without cracking.

The tensile strength of P275N pressure vessel steel sheet makes it ideal for:

• Boiler shells and steam drums
• Pressure vessels and LPG tanks
• Oil and gas storage tanks
• Heat exchangers
• Industrial pipelines

In these applications, the steel must handle combined stress, temperature changes, and pressure cycles.

Compared to higher grades like P355N:

• P275N Material → Lower tensile strength, more cost-effective
• P355N → Higher strength for more demanding conditions

This makes P275N pressure vessels steel a preferred choice for medium-pressure applications where extreme strength is not required.

The tensile strength of P275N pressure vessels steel sheet (390–510 MPa) provides a reliable balance between strength and workability. It ensures safe performance in pressure environments while maintaining good fabrication properties.

For pressure vessel and boiler applications, selecting the right tensile strength is essential for safety and efficiency. Our P275N pressure vessels steel sheet meets EN standards with stable mechanical performance and fast delivery.

Contact us today to get technical support and the latest price for P275N Material.

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.