P355NL1 / 1.0566 Pressure Vessel Steel Plate

Steel P355NL1

📌 Overview and Technical Specifications

Steel P355NL1 is a non-alloy structural steel designed for pressure vessels, offering high strength, ductility, and excellent weldability. It is widely used in the energy, petrochemical, and heavy machinery industries.

🛠 Specifications:

• Hardness: ≤ 220 HB
• Thickness: from 3 mm to 100 mm
• Yield strength: ≥ 355 MPa
• Tensile strength: 490–630 MPa
• Elongation: 20–24%

🧪 Chemical Composition

• Carbon (C): ≤0.18%
• Silicon (Si): ≤0.40%
• Manganese (Mn): 1.00 – 1.70%
• Phosphorus (P): ≤0.025%
• Sulfur (S): ≤0.015%
• Aluminum (Al): ≥0.020%
• Chromium (Cr): ≤0.30%
• Nickel (Ni): ≤0.50%
• Molybdenum (Mo): ≤0.08%

⚙ Applications

Steel P355NL1 is widely used in the following industries:

• 🔥 Manufacturing of boilers and heat exchangers
• 🛢 Production of tanks and pressure vessels
• ❄️ Cryogenic installations and storage systems
• 🏗 Structural components for heavy machinery
• 🏭 Chemical and petrochemical industries
• ⚡ Components for power plants

🌟 Features

• ✅ High strength and ductility
• ✅ Excellent weldability without the need for heat treatment
• ✅ Outstanding frost resistance and stability in cryogenic conditions
• ✅ Good resistance to high temperatures and pressure
• ✅ Durability under prolonged mechanical loads
• ✅ Enhanced corrosion resistance

P355NL1 pressure flat steel delivery forms