S355JR is a kind of low alloy high-strength structural steel plate, commonly used in bridges, buildings, ships, vehicles, pressure vessels and other fields. The S in its grade indicates that it is a structural steel, the 355 indicates that its minimum yield strength is 355MPa, and the JR indicates that its impact function is in accordance with grade J. S355JR steel plate has excellent mechanical properties and welding performance, and is widely used in various engineering structures.
The chemical composition of S355JR steel plate mainly includes carbon, silicon, manganese, phosphorus, sulfur and other elements. Among them, the carbon content is between 0.12 and 0.22%, the silicon content is between 0.10 and 0.50%, and the manganese content is between 0.60 and 1.10%. Meanwhile, the steel plate also contains a small amount of titanium, chromium, nickel and other elements, the presence of which improves the strength and corrosion resistance of the steel plate.
The minimum yield strength of S355JR steel plate is 355MPa, and the maximum tensile strength is 490MPa. its impact function meets the requirements of class J, and it has good toughness and ductility. In addition, S355JR steel plate has good fatigue resistance and corrosion resistance, which can meet the needs of various engineering structures.
S355JR steel plate is widely used in bridges, buildings, ships, vehicles, pressure vessels and other fields. In bridge construction, S355JR steel plate can be used to manufacture bridge girders, box girders and other structural parts to improve the carrying capacity and service life of bridges.
