Grade: S355J+N Steel Plates

S355J+N is a non-alloy structural steel that is part of the European standard EN 10025. It is commonly used in construction and engineering applications due to its good mechanical properties and weldability. Here are the details, specifications, mechanical properties, and chemical composition of S355J+N steel:
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Chemical Composition (Percentage by Weight):

Carbon (C) Silicon (Si) Manganese (Mn) Phosphorus (P) Sulfur (S)
0.20% max 0.55% max 1.60% max 0.035% max 0.035% max

Mechanical Properties:

Tensile Strength (at room temperature) Yield Strength (at room temperature) Elongation (in 50mm Charpy V-Notch Impact Test
470-630 MPa 355 MPa min 22% min 27 J (20 ft-lbf) minimum at -20°C (-4°F)

Typical Properties:

Density Thermal Expansion Electrical Conductivity Poisson’s Ratio Modulus of Elasticity (Young’s Modulus)
7.85 g/cm³ (0.284 lb/in³) 12.5 x 10^(-6)/°C (7 x 10^(-6)/°F) 17% IACS (International Annealed Copper Standard) 0.27-0.30 190-210 GPa (27.5-30.5 x 10^6 psi)

S355J+N steel is known for its good weldability, making it suitable for a wide range of structural and engineering applications. It is often used in the construction of buildings, bridges, machinery, and various structural components.

Key points about S355J+N steel:

Strength: S355J+N has a good balance of strength and ductility, with decent tensile strength and yield strength, making it suitable for structural applications.

Weldability: It is known for its excellent weldability, which means it can be easily and reliably welded using various welding methods.

Chemical Composition: The low carbon content of S355J+N contributes to its weldability, and the manganese content helps improve its mechanical properties.

Ductility: This steel grade exhibits good elongation properties, allowing it to withstand deformation without brittle failure.

Applications: S355J+N is used in a wide range of applications, including construction, machinery manufacturing, and general engineering projects.


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