EN10028-6 P355QL1 is a pressure vessel steel plate grade that is widely used in the fabrication of pressure vessels and boilers, especially for applications requiring high strength and good toughness at low temperatures. This grade is part of the European standard for flat products for pressure equipment, and it is designed to ensure the highest levels of safety and reliability.

Chemical Composition:

The chemical composition of P355QL1 is strictly controlled to ensure the necessary mechanical properties and weldability. The typical chemical composition is as follows:

· Carbon (C): ≤ 0.18%

· Silicon (Si): ≤ 0.50%

· Manganese (Mn): ≤ 1.60%

· Phosphorus (P): ≤ 0.025%

· Sulfur (S): ≤ 0.015%

· Nickel (Ni): ≤ 0.80%

· Chromium (Cr): ≤ 0.30%

· Molybdenum (Mo): ≤ 0.08%

· Copper (Cu): ≤ 0.30%

· Niobium (Nb): ≤ 0.05%

· Titanium (Ti): ≤ 0.03%

· Vanadium (V): ≤ 0.05%

Mechanical Properties:

The mechanical properties of P355QL1 are characterized by its high strength and excellent toughness, which are crucial for pressure vessel applications. The typical mechanical properties are as follows:

· Yield Strength: ≥ 355 MPa

· Tensile Strength: 510 - 680 MPa

· Elongation: ≥ 19%

· Impact Energy (at -40°C): ≥ 40 Joules

Heat Treatment:

P355QL1 is generally supplied in the thermomechanically rolled condition (TMCP), which provides the steel with its excellent mechanical properties. The TMCP process involves controlled rolling and cooling to achieve the desired microstructure and mechanical properties without the need for further heat treatment.

Low-Temperature Impact Test:

The steel is subjected to a low-temperature impact test to ensure that it maintains adequate toughness at sub-zero temperatures. This is particularly important for applications where the equipment may be exposed to cold environments.

Available Dimensions:

TJC Steel Group offers P355QL1 in a wide range of sizes to meet various project requirements. The typical available dimensions are:

· Thickness: 6mm to 300mm

· Width: 1500mm to 4050mm

· Length: 3000mm to 18000mm

Main Applications:

P355QL1 is commonly used in the construction of pressure vessels, boilers, and other equipment that requires high strength and good toughness at low temperatures. It is suitable for applications in the petrochemical, chemical, oil and gas, and power generation industries.

TJC Steel Group Supply Cases:

TJC Steel Group has extensive experience in supplying P355QL1 pressure vessel steel plates to various industries worldwide. One notable supply case involved the fabrication of a series of pressure vessels for a major oil refinery. TJC provided high-quality P355QL1 plates that met the stringent requirements of the project, ensuring the safety and longevity of the equipment.

In conclusion, EN10028-6 P355QL1 is a high-quality pressure vessel steel plate that offers excellent mechanical properties and reliability for critical applications. TJC Steel Group is a trusted supplier of this grade, providing robust and dependable materials for the global market.