Introduction of European standard S355JR steel plate.
1. Overview. European standard S355JR steel plate is a high-quality construction steel plate, which is mainly used in bridges, construction and machinery manufacturing and other fields. It has excellent mechanical properties, high strength and good durability, and can meet the requirements of various complex environments. This article will introduce the performance characteristics, production process and practical application of European standard S355JR steel plate in detail.
Second, the performance characteristics of European standard S355JR steel plate.
1.High strength: European standard S355JR steel plate has high yield strength and tensile strength after a special smelting and rolling process, and can withstand large pressure and tensile force.
2.Good durability: The steel plate has been treated with anti-corrosion and has good corrosion resistance, which can ensure long-term use in harsh environments.
3.Excellent processing performance: European standard S355JR steel plate has good weldability and cutability, and is easy to carry out processing operations such as cutting, welding and punching.
4.Wide range of applications: Due to its excellent performance, European standard S355JR steel plate is widely used in bridges, construction, machinery manufacturing, shipbuilding and other fields.
3. The manufacturing process of European standard S355JR steel plate.
1.Smelting: electric furnace or converter is used for smelting to ensure high purity and stable chemical composition of molten steel.
2.Rolling: After multiple passes of rolling process, the internal grain of the steel plate is refined, the structure is uniform, and its mechanical properties are improved.
3.Heat treatment: By controlling the heating and cooling rate, the steel plate can obtain an ideal metallographic structure, further improving its mechanical properties and durability.
4.Surface treatment: According to the need, the steel plate is galvanized, sprayed and other surface treatment to improve its corrosion resistance and appearance quality.
S355JR Chemical Composition:
Carbon c : 022；Silicon si: 055；Manganese mn: 160；Phosphorus p : 0025；Sulfur s : 0025；cu：≤0.55；
S355JR Yield Strength(MPa): 16mm: 355;16—40：≥345；40—63：≥335；63—80：≥325；
S355JR tensile strength.
mpa）：450—680。
Fourth, the application example of European standard S355JR steel plate.
1.Bridge engineering: European standard S355JR steel plate is widely used in various bridge projects because of its high strength and good durability. For example, a large cross-river bridge uses the steel plate as the main girder material, which greatly improves the bearing capacity and service life of the bridge.
2.Construction engineering: In high-rise buildings, large industrial plants and other fields, European standard S355JR steel plate is widely used. For example, a large industrial plant uses the steel plate as a roof and wall panel, which effectively improves the load-bearing capacity and durability of the building.
3.Machinery manufacturing: In the field of machinery manufacturing, European standard S355JR steel plate is used to manufacture various equipment shells, brackets and other structural parts. Its excellent processing performance and strength can meet the special requirements of various complex equipment.
4.Shipbuilding: In the field of shipbuilding, European standard S355JR steel plate is widely used in hull structure, deck and other parts because of its good corrosion resistance and high strength. Its reliable performance can ensure the safe navigation of the ship in various harsh environments.
It has good comprehensive mechanical properties, low temperature impact toughness, cold stamping, machinability, and is widely used in welded structures under dynamic load, such as bridges, vehicles, ships, pipelines, boilers, large containers, oil tanks, heavy machinery and equipment, mining machinery and -40 cryogenic pressure vessels.
5. Summary. As a high-quality steel plate for construction, the European standard S355JR steel plate has a wide range of application prospects and market demand. Its excellent performance and reliable quality assurance can meet the requirements of use in various complex environments, and provide strong support for the development of China's construction, machinery and shipbuilding industries.