JIS G3103 SB410 is a carbon-manganese-silicon steel plate specifically designed for boilers and pressure vessels, featuring high strength, excellent toughness, weldability, and corrosion resistance. It is widely used in energy, chemical, petroleum, construction, and other industries.
High Strength and Toughness
Tensile Strength: 410–550 MPa, Yield Strength: ≥225 MPa, Elongation After Break: ≥21%.
Low-Temperature Toughness: Impact energy at 0°C ≥27 J (actual values typically reach 40–70 J), ensuring safety in extremely cold environments.
High-Temperature Stability: Maintains ≥80% strength at temperatures ≤400°C, suitable for high-temperature and high-pressure applications.
Excellent Weldability
Low Crack Sensitivity: Supports conventional welding processes such as arc welding and submerged arc welding, ensuring stable and reliable welding quality.
Low Carbon Design (C ≤0.30%): Optimizes welding performance and reduces the risk of welding cracks.
Good Corrosion Resistance
Suitable for environments containing corrosive media such as hydrogen sulfide and carbon dioxide, extending the service life of equipment.
Mature Manufacturing Process
Normalizing treatment forms a ferrite + pearlite microstructure, ensuring uniform mechanical properties.
Strict control of chemical composition (e.g., P ≤0.035%, S ≤0.035%) guarantees material stability.
Cost-Effectiveness
Compared to high-alloy steels, SB410 has lower production costs, making it suitable for large-scale industrial applications.
