S235J2 is a European standard ordinary carbon structural steel plate, and its implementation standard is the European standard EN10025 standard. Specifically, the "S" in S235J2 represents structural steel, "235" indicates that the lower limit of yield strength is 235MPa, and "J2" indicates that the steel plate still has good impact toughness at -20°C.

The main chemical components of S235J2 include carbon (C), silicon (Si), manganese (Mn), phosphorus (P) and sulfur (S)：

C	Si	Mn	P	S
≤0.17%	≤0.35%	≤0.65%	≤0.030%	≤0.030%

The production method of S235J2 mainly includes the following steps: steelmaking, continuous casting or mold casting, rolling, cooling, heat treatment, surface treatment, and quality testing.

The characteristics of S235J2 steel plate are mainly reflected in the following aspects:

1. It has good mechanical properties: The mechanical properties of S235J2 steel plate are outstanding in terms of withstanding heavy load and stress. Its yield strength MPa ≥ 225, tensile strength MPa between 360 and 510, and elongation % ≥ 18. These performance indicators make it possible to meet the needs of various complex projects.

2. Has good processing performance: S235J2 steel plate can be processed such as cutting, bending, stamping and welding. In terms of cutting, flame cutting, laser cutting or plasma cutting can be used for cutting; in terms of bending, hot bending or cold bending can be used for bending; in terms of stamping, a stamping machine can be used for stamping; in terms of welding , welding can be carried out using electrode arc welding, submerged arc welding or gas shielded welding.

The application range of S235J2 steel plate is very wide, mainly including the following fields: S235J2 steel plate can be used to manufacture structural parts such as pidge beam plates, arch ribs and nodes. S235J2 steel plates are widely used in manufacturing beams, columns, plates and other structural parts of buildings. Its excellent mechanical properties and workability can meet the needs of different building design and construction. S235J2 steel plate can be used to manufacture hull structural parts, decks, bulkheads, etc. in the field of shipbuilding. S235J2 steel plate can be used to manufacture vehicle chassis, frames, compartments and other structural parts. S235J2 steel plate can be used to manufacture various mechanical parts, such as valves, fasteners, wear-resistant parts, etc.