EN 10225 S355NL02 Introduce
EN 10225 S355NL02 steels were developed primarily for use in the offshore oil and gas industry and is used extensively within the industry due to their excellent fabrication properties. The steels are well-suited to fabrication and welding and have good cold workability characteristics enabling section sizes to be reduced and weight savings to be achieved. Opportunities for cost reduction can also be achieved by eliminating mechanical properties welding, for example the non-standard welding preparations and greater welding speed due to lower heat inputs.
Smelting temperature:1129°C - 1658°C
Application:Weldable structural steel with fixed offshore structure - Technical delivery conditions
EN 10225 S355NL02 Material Chemical Composition
The chemical composition of the EN 10225 S355NL02 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Molybdenum (Mo) | - | 0.0800 |
| Nickel (Ni) | - | 0.5000 |
| Chromium (Cr) | - | 0.2500 |
| PhOsphorus (P) | - | 0.0200 |
| Sulfur (S) | - | 0.0100 |
| Manganese (Mn) | 1.0000 | 1.6500 |
| Silicon (Si) | 0.1500 | 0.5500 |
| Carbon (C) | - | 0.1400 |
EN 10225 S355NL02 Material Mechanical Properties
The strength of EN 10225 S355NL02 steel is also impressive. This steel has a yield strength of 340 MPa, which is fairly high for a steel of this class. This means that this steel is more resistant to deformation when subjected to tension and compression forces. Additionally, the ultimate tensile strength of EN 10225 S355NL02 steel is 560 MPa, which is very high for a structural steel. This makes it ideal for applications that require a high degree of strength and stability.
The mechanical properties of the EN 10225 S355NL02 steel are as follows:
| YieldRp0.2 | ≤ 311 (MPa) |
| TeileRm | ≤ 347 (MPa) |
| ImpactKV/Ku | 34(J) |
| ElongationA | 11% |
| Reduction in cross section on fractureZ | 21% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 111 |
EN 10225 S355NL02 Material Thermal Properties
The thermal performance parameters of the EN 10225 S355NL02 steel are as follows:
| Temperature (°C) | 23 | 476 | 768 |
| Modulus of elasticity (GPa) | - | 918 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 13.3 | 31.2 |
| Specific thermal capacity (J/kg·°C) | - | 121 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.33 | - | - |
| Deity (kg/dm³) | - | - | 414 |
| Poisson’s coefficient, ν | - | - | 241 |
EN 10225 S355NL02 Material Machining Technology
The main advantages of using EN 10225 S355NL02s are as follows:
• Excellent weldability
• Enhanced fatigue performance
• Improved sectional properties which allows analysis of smaller components with less material
• Reduction in fabrication and welding costs
• Enhanced corrosion resistance compared with traditional carbon-manganese steels
• High strength, good toughness and impact resistance
• Good cold workability
• Improved fracture toughness